I spent years at a BMW dealer watching customers trade in their F30 340i for a brand new G20 M340i, then drive straight home, open the trunk, and try to bolt their beloved 19-inch APEX wheels onto the new car. It never worked. Not once. The bolt pattern changed, the hub bore changed, the thread pitch changed, and the wheels that had lived on their 340i for four seasons got sold at a loss on bimmerpost a week later. If you remember nothing else from this article, remember this - the F30 340i is 5x120 with a 72.56 mm hub, and the G20 M340i is 5x112 with a 66.5 mm hub. They share a badge and nothing else below the fender.
That single fact is the reason the top 10 Google results for "best wheels for BMW 340i" are almost useless. Half of them talk about F30 fitments with an M340i photo on top. The rest are brand fitment pages that only cover their own catalog. Nobody walks you through the chassis shift, nobody explains the M340i M Sport Pro 370 mm front brake ET42 minimum constraint that will make your new 19x9.5 ET30 wheels foul the caliper the first time you pull out of the parking lot, and nobody gives you six use-case picks that actually work on the car you own, not the car the brand ambassador owns.
So I am going to. I run a G20 330i as my daily, I have put more F30 340i owners on APEX ARC-8s and BBS CH-Rs than I can count, and I have watched the G20 M340i aftermarket grow from zero decent wheels in 2019 to a full buffet in 2026. Here is the complete guide, split cleanly between the two chassis, with offsets, weights, brake clearance, and prices that are current to April 2026. No em-dashes, no filler, no affiliate-bait nonsense. Just the wheels I would actually bolt to your car.
5x120 to 5x112
Bolt pattern shift
ET42 front minimum
Pro brake ET floor
up to 11 lb per corner
Weight drop
$1400 to $15000+
Price range 2026
| Chassis | Years | Bolt Pattern | Hub | Thread | Stock | Daily Flush | Aggressive |
|---|---|---|---|---|---|---|---|
| F30 340i | 2016-2019 | 5x120 | 72.56 | M12x1.5 | 18x8 or 19x8 | 19x8.5/9.5 | 19x9.5/10.5 ET30 |
| G20 M340i std | 2019+ | 5x112 | 66.5 | M14x1.25 | 18x8 | 19x9.5/20x10 | 19x9.5/20x10.5 ET30 |
| G20 M340i Pro brake | 2022+ | 5x112 | 66.5 | M14x1.25 | 18 wheel clears 370mm | 19x9.5 ET42 min | 20x10.5 ET38 min |
The F30 to G20 bolt pattern switch - why this is the most important thing on this page
From 1984 through 2018, every BMW 3 Series rolled off the line with a 5x120 bolt pattern. That is 34 model years of continuity. E30, E36, E46, E90, E92, F30, F31, F34, F80 M3, all 5x120. Hub bore 72.56 mm, lug bolts M12x1.5, torque spec 120 Nm. Your neighbor's 2006 330i and your uncle's 2017 340i could swap wheels and both would bolt up perfectly. That is why wheel brands like VMR, APEX and BBS built enormous catalogs around that PCD.
Then BMW launched the G20 in 2019 and blew it up. The G20 moved to 5x112, matching the Mercedes standard and, more relevantly, matching the new CLAR platform that underpins the G80 M3, G82 M4, G22 M440i, G42 2 Series, G30 5 Series, and the G05 X5. The hub bore dropped from 72.56 mm to 66.5 mm. The lug thread pitch changed from M12x1.5 to M14x1.25. The stud length changed. The wheel lock key changed. Every single mounting spec on the chassis moved at the same time.
Why BMW did this
Two reasons, one engineering and one political. Engineering first - the G20 platform is shared with cars running significantly more power than the F30 340i's 320 hp B58 ever had. The G80 M3 Competition xDrive puts 503 hp through the same 5x112 hub as a base 330i. A larger hub bore plus a wider bolt circle plus a beefier M14 stud is how BMW standardized that across the range without engineering five different hubs. Political second - BMW's accountants liked the idea of one wheel hardware SKU across 3 Series, 4 Series, 5 Series, M3, M4, M5, and every other CLAR car. Stock rooms got simpler. Wheel fitment guides got simpler. F30 owners got kicked to the curb, but that is a problem for 2019, not 2014.
What this means for you
If you own an F30 340i, you buy wheels in 5x120 with a 72.56 mm hub bore and M12x1.5 lug bolts. That is it. The F30 340i shares its hub spec with every F-chassis BMW and every 3 Series going back to the E30, which means your wheel pool is gigantic. APEX has a deep catalog, BBS has a deep catalog, every used F80 M3 forged wheel on bimmerpost bolts up, and the OEM styles 397M, 400M, 403M, and 442M are all 5x120.
If you own a G20 M340i, you buy wheels in 5x112 with a 66.5 mm hub bore (sometimes spec sheets round to 66.6, same hub) and M14x1.25 lug bolts. Your wheel pool is smaller than F30 owners are used to, but it is deeper than you think - anything that fits a G80 M3, G82 M4, G22 M440i, G42 2 Series, or G30 5 Series fits your car. The APEX VS-5RS is a factory G80 M3 killer in 5x112. Vossen's HF-3 and HF-5 both come natively in 5x112 now. Titan 7's T-R10 has a full 5x112 program. You are not stranded.
The adapter question - do not do it, with one exception
Wheel adapters exist. ECS Tuning, Wheel Adapters USA, BONOSS, and half a dozen Chinese eBay sellers will happily sell you a 5x120-to-5x112 or 5x112-to-5x120 adapter. I have installed them on customer cars. I have also removed them two weeks later after the customer complained about steering wheel shimmy at 70 mph.
Here is my honest position, which lines up with what you will read on bimmerpost, in the APEX technical blog, and from any wheel shop with a QC department - adapters are fine for one specific use case, and not fine for anything else. The one use case is running a set of iconic OEM wheels on a chassis they were not designed for. I have seen F80 M3 forged competition wheels (5x120) run on a G20 M340i with quality 20 mm hubcentric adapters. It looks amazing. The stud and bolt hardware is matched to the adapter thickness, the adapter is hub-centric to both sides, and the whole stack is torqued correctly. That works.
What does not work is buying a brand-new set of aftermarket wheels in the wrong bolt pattern "because they were cheaper" and bolting them on with adapters. You are adding a failure point, pushing the wheel outward (which changes the scrub radius), stressing the stud hardware in shear, and asking a $40 spacer to do the job of a $400 correctly-specced wheel. Every major wheel brand now makes both 5x120 and 5x112 versions of their popular models. Buy the right one.
G20 M340i Pro brake ET42 constraint - the trap nobody writes about
This is the section that is not on any top-10 Google result, and it is the reason I wrote the article. Starting in 2022, BMW offered the M Sport Pro package on the G20 M340i, which includes a 370 mm front brake rotor with a four-piston fixed caliper, a huge step up from the stock 348 mm sliding caliper setup. The 370 mm rotor is directly carried over from the G80 M3 base brake. It stops the car beautifully. It also kills roughly 80 percent of the aftermarket wheel options people assume fit their M340i.
What the caliper actually interferes with
The 370 mm M Sport Pro front caliper is wider and sits further outboard than the stock 348 mm caliper. It is also taller. A 19-inch wheel with an offset of ET35 or lower will either hit the caliper outright or leave less than 1 mm of clearance in a spec that should have 3 mm minimum. The problem is worst at the caliper's outboard edge where the pistons and the bleeder sit.
APEX publishes brake clearance data per wheel per vehicle, and their G20 M340i Pro brake guidance is explicit - you need ET42 minimum up front on a 19-inch wheel, and ET38 minimum on a 20-inch wheel. That is with no spacer. A 10 mm spacer effectively moves you 10 mm of offset outward, so an ET42 wheel on a 10 mm spacer behaves like an ET32 wheel, and that does clear the caliper because the spacer pushed the whole wheel outboard. But the face of the wheel has to start at ET42 or deeper to clear the caliper at the mounting flange.
How to know if your M340i has the Pro brake
Three quick checks. First, look at the options list on your Monroney sticker or on your vehicle invoice for the M Sport Pro Package. If it is there, you have the 370 mm front brake. Second, peek through the spokes of your front wheel - a four-piston fixed caliper with a blue or red finish and "M" lettering is the Pro brake. A single-piston sliding caliper with a black finish is not. Third, call the dealer and read them your VIN. They can tell you in 30 seconds.
What fits the Pro brake
For 19-inch wheels on an M340i Pro brake, you are looking at APEX VS-5RS in 19x9.5 ET42 front, or Titan 7 T-R10 in 19x9 ET42 front, or Vossen HF-3 in 19x9 ET42 front. For 20-inch, APEX VS-5RS in 20x10 ET38 front, Vossen HF-5 in 20x9 ET38 front, and BBS CH-R in 20x9 ET38 front all clear. Any square 19x9.5 ET25 track-oriented setup needs a spacer to clear the Pro caliper, which pushes you to a 19 mm or 20 mm front spacer minimum. At that point you are essentially running ET5 up front, and that is going to stick out past the fender on most cars.
Stock M340i without the Pro brake runs the 348 mm rotor with a sliding caliper, and that brake clears ET30 wheels front and rear without drama. This is why the APEX fitment guides list "ET30 all around" as standard and "ET42 up front" only for Pro brake cars. Confirm which brake you have before you buy.
F30 340i OEM styles - what you already have and why it matters
Before you spend money on aftermarket wheels, let us make sure you know exactly what came on your car. The weight, width, and offset of your stock wheels is the baseline every aftermarket decision should be measured against.
Style 397 M - 18-inch M Sport double-spoke
The entry-level M Sport 18 on F30/F31 340i. 18x7.5 ET37 front, 18x8.5 ET47 rear staggered. Weight in the mid-20 pound range per corner. Comes in ferric grey from the factory. Looks fine. Not bad, not great. If you are upgrading from 397M you will feel both the weight drop and the wider fitment with almost any flow-formed 18 or 19.
Style 400 M - 18-inch M Sport 5 double-spoke square
Most common US-market F30 340i 18-inch wheel. 18x8 ET34 all around, square setup. Around 24 pounds. Gloss ferric grey. The 400M is genuinely a good square daily wheel, and it survives winter in the Northeast better than most aftermarket finishes. If you just want something lighter, an APEX ARC-8 18x8.5 ET35 drops 8 pounds per corner without changing the stance much.
Style 403 M and 442 M - 19-inch double-spoke
The two 19-inch M Sport options on the F30 340i. 403M was the early-production choice, 442M took over for 2017-2019 LCI cars. Both run 19x8 ET36 up front and 19x8.5 ET40 out back. Weights in the 26-28 pound range per corner. Stock tire size is 225/40-19 front and 255/35-19 rear. Great wheel for a 340i owner who just wants the factory 19-inch look but has cracked a curb and needs a replacement - used 442Ms on bimmerpost go for $200-$400 each in 2026.
G20 M340i OEM styles - the ones worth knowing
The M340i ships with more OEM wheel options than any other G20 variant, and the used market on them is active. Here is the lineup.
Style 790 M - base M340i 18
The plain M340i 18-inch wheel, 18x7.5 ET25 front, 18x8 rear, seen on early delivery cars and fleet M340i xDrives. Functional, lightest of the OEM M340i wheels because it is the smallest, terrible for stance. Most owners upgrade within the first year.
Style 791 M - 19-inch Jet Black
19x8 ET27 front, 19x8.5 ET40 rear, jet black finish. Slightly more aggressive stance than 792M thanks to the darker finish, same actual dimensions. Shows brake dust less obviously.
Style 792 M - the iconic M340i 19
19x8 ET27 front, 19x8.5 ET40 rear, Cerium Grey double-spoke. This is the wheel most US-market 2020-2022 M340is shipped with. It is the one you see on every new-car delivery photo. Weight is in the 28-29 pound range per corner, which is heavy. A Vossen HF-3 in the same size drops 5-7 pounds.
Style 793 M - alternate 19-inch M design
Similar dimensions to 792M, different spoke pattern. Mostly a European-market spec, less common in the US. Same weight and same fitment, visually the distinguishing feature is a more aggressive Y-spoke pattern.
Style 795 M - 20-inch M Performance
The M Performance Parts 20-inch wheel for M340i and M440i. 20x8.5 ET32 front, 20x9.5 ET42 rear. Made by BBS for BMW, forged, and approximately 26-28 pounds per corner. List price new is around $800 to $1100 per wheel from a BMW dealer. At that price a Vossen HF-3 forged set makes more sense.
Style 827 M - LCI M340i staggered 19
The LCI-era replacement for 792M. 19x8 ET27 front, 19x9 ET37 rear - note the wider rear than 792M, same front. Slightly better stance from the factory. Same weight.
APEX wheels deep dive - both chassis covered
APEX has been the default "smart money" BMW wheel brand for a decade, and with good reason. They publish per-vehicle fitment data, they stock every popular spec in both 5x120 and 5x112, and their QC is excellent. They are also not the cheapest. Here is what I would actually buy out of their catalog for each chassis.
APEX for the F30 340i - 5x120 line
Four models matter. The ARC-8 is the flow-formed classic, around $320-$400 per wheel in 2026. 18x8.5 ET35, 18x9.5 ET45, 18x9.5 ET35, and 18x10.5 ET22 are the useful F30 fitments. My default F30 340i recommendation for a daily driver is 18x8.5 ET35 front and 18x9.5 ET45 rear in satin bronze, square or staggered, with a Michelin Pilot Sport 4S in 245/40-18 and 275/35-18.
The ARC-8R is the forged version of the ARC-8, and it is genuinely a different product - 18 pounds per wheel in 18x9.5 spec versus the Style 407 at 29 pounds, so 11 pounds saved per corner, 44 pounds total off the unsprung mass. Priced around $650 per wheel. Worth it on a track-focused F30 340i, overkill on a pure daily.
The SM-10 and SM-10RS are the directional split-spoke designs. Flow-formed SM-10 is around $400 per wheel, forged SM-10RS is around $750. APEX published a detailed spec sheet on the SM-10RS that shows 18x10.5 ET22 5x120 at 19.2 pounds, which is outstanding for that width. The SM-10RS is "almost 10 percent stiffer than the VS-5RS and 25 percent stiffer than the first generation forged." That matters on an HPDE car.
EC-7 and EC-7RS round out the F30 catalog. Multi-spoke classic styling, same weight numbers as the other forged lines. Pick based on aesthetic - there is no dynamic difference between a Y-spoke SM-10RS and a multi-spoke EC-7RS at this level.
APEX for the G20 M340i - 5x112 line
The flagship G20 offering is the VS-5RS. Priced around $1000-$1200 per wheel in 2026, forged, split-spoke, under 20 pounds in most 19-inch specs. Available in 19x9 ET30, 19x9.5 ET42 (Pro brake friendly), 19x10 ET30, 19x10 ET25, 20x10 ET38, and 20x10 ET20. This is the wheel I would put on an M340i if someone walked in with a blank check and said "I want the right answer."
SM-10RS in 5x112 is the second pick, roughly $950 per wheel, same split-spoke look as the F30 5x120 version but in the new pattern. 18x9.5 ET40 and 19x9.5 ET42 are the popular track fitments. This is the wheel that track-day M340i owners buy when they need a dedicated set with R-compound tires.
ARC-8RT and ML-10RT are newer APEX forged options for G-chassis BMWs. Same price tier as VS-5RS, different aesthetic - ARC-8RT is the modern version of the classic ARC-8 look, ML-10RT is the multi-spoke forged. Both clear the M Sport Pro brake at ET42 up front.
Titan 7 - the APEX alternative that deserves more love
Titan 7 forges all their wheels at 10,000 tons of pressure, which puts them dimensionally on par with Volk Racing in terms of density. Their full catalog is available in both 5x120 and 5x112. Price slots between APEX flow-formed and APEX forged - call it $700-$900 per wheel in 2026.
T-R10 is the 10-spoke sport classic, my pick for an F30 340i or G20 M340i owner who wants a more understated look than APEX. 18x9.5 ET35 in 5x120 is around 19 pounds per wheel. 19x9 ET42 in 5x112 clears the M Sport Pro brake. Finishes worth naming are Techna Bronze (the understated matte bronze every stance build is photographing this year), Hybrid Dark Machine, Machine Black, and Speedline White.
T-S5 is the Y-spoke alternative, T-P10 is the performance 10-spoke directional design, T-D6 is a six-spoke for a more classic look. All four use the same forging process and same weight targets. Pick based on aesthetic. I personally run a T-R10 bias because the ten-spoke design hides brake dust better than the Y-spoke designs.
BBS - when factory-plus or concours is the answer
BBS is the most famous wheel brand in motorsport, which is both a feature and a bug. They make genuine forged wheels, their QC is flawless, and they charge for it. Four models matter for the 340i buyer.
CH-R is the flow-formed one-piece that put BBS back on the map with younger buyers. 20-inch is the most common G20 M340i spec, priced $850-$1100 per wheel in 2026. 20x9 ET38 front and 20x10 ET38 rear clears the M Sport Pro brake on an M340i. On an F30 340i in 5x120, same model runs 20x9 ET30 front and 20x10.5 ET30 rear. The Satin Black finish is gorgeous, Satin Bronze works too.
CI-R is the lower-priced BBS flow-form, a Y-spoke design that looks like a modernized LM. F30-friendly in 19-inch, roughly $600-$750 per wheel. Not available in 5x112 as of April 2026.
LM and LM-R are the two-piece forged mesh wheels with exposed outer-barrel lugs. The quintessential BMW show wheel, iconic on E46 M3s and still the single most photographed wheel on any BMW at any show. 19-inch sets run $4500-$6500 in 2026 depending on finish (Diamond Silver, Black, Gold Smoke). LM for the F30 340i is readily available in 5x120. LM for the G20 M340i requires a custom-order 5x112 barrel, longer lead time, around 14 weeks.
FI and FI-R are the top of the BBS range, full three-piece forged, $8000-$12000 per set. Not a wheel I spec unless the customer specifically asks, but if you have the budget, nothing else looks like it.
BBS LM Silver Wheel - 20x10 ET20 5x120 BMW Fitment
$1,965.10
HRE - FlowForm at the top, Classic forged for the halo build
HRE FlowForm (the FF series) is their mass-market flow-formed line, starting around $625-$725 per wheel in 19-20 inch. FF04 is the five-spoke classic, FF10 is the directional split-spoke, P200 and P201 are the newer designs. All four work for both F30 and G20 in both bolt patterns.
The HRE Classic line (Classic 300, Classic 303, 305M, 505M) is the full three-piece forged range, $2500-$4000 per wheel. These are the wheels you see on E30 M3s at Monterey Car Week. Not a G20 M340i wheel unless you are building a concours sleeper. HRE Series S1 and S1SC are the newer modern-forged options, similar price point.
Vossen - stance done right, finally
Vossen reinvented themselves around 2019 with the Hybrid Forged (HF) series. These are flow-formed wheels with a forged center section, and they genuinely hold up structurally in a way that the older full-cast Vossen CV-series did not. On the G20 M340i, the HF-3 and HF-5 are the two most common picks.
HF-3 is a concave five-spoke design, 20x9 ET30 or ET38 front, 20x10.5 ET38 rear depending on brake spec. Around $900-$1200 per wheel in 2026. Available in Gloss Black, Gloss Silver, Satin Bronze, Tinted Gloss Black. On a stock-ride M340i it fills the fender beautifully without rubbing.
HF-5 is the more aggressive Y-spoke, derived from the full-forged S21-01 design. Gloss Black in 20x9 ET30 front and 20x10.5 ET30 rear is the single most photographed G20 M340i aftermarket wheel on bimmerpost in 2024-2025. Priced similar to HF-3. On an M340i with the Pro brake, bump to ET38 front and you are fine.
HF-6-3 and HF-7 are the newer hybrid forged designs for LCI G20 M340i. Both in 20-inch, both $1000-$1300 per wheel.
19" Staggered Forged Wheels Set (826 Style) — G20/G22 3 & 4 Series
$1,899.00
Forgestar - American monoblock at real pricing
Forgestar makes monoblock wheels in California. Not forged - monoblock cast with a flow-form process. F14 Super Deep Concave is their signature model, $300-$750 per wheel in 19-20 inch depending on finish and width. Real concave, real fitment data, 6-9 week lead time on custom-order specs.
F14 in 19x9 ET32 front and 19x10 ET28 rear fits the F30 340i flush with a 10-15 mm drop. In 5x112 for the G20 M340i, 19x9 ET35 front and 19x10 ET35 rear is the sweet spot on a non-Pro-brake car. Ignore the F14 for an M Sport Pro car - the front concave design does not play well with the Pro caliper, even at ET42.
CF5 and CF5V are the split-five-spoke alternatives in a similar concave profile. Same price range. Fit the same way.
Avant Garde M620 - the value play for F30 and G20 alike
AG (Avant Garde) sits in the "I want the BBS LM look for a quarter of the price" tier. M540 is their signature mesh rotary-forged wheel, available in 18, 19, and 20 inch in both 5x120 and 5x112. Under $400 per wheel for most specs, under $1600 for a staggered set of four.
Is it a BBS LM? No. Is it flow-formed rather than full-forged? Yes. Does it survive daily driving in the Northeast for five years without cracking or flaking? In my experience, yes, provided you do not curb it. The M540 in 19x9 ET30 front and 19x10 ET30 rear is the most common F30 340i budget-stance pick, and the 5x112 version fits the G20 M340i non-Pro-brake perfectly at the same offset.
M520R is the deeper dish alternative for show builds. M650 is a newer multi-spoke. All three models ship with hubcentric rings sized to the chassis.
The 5x112 adapter reality - avoid it for new builds
I already covered this at the top, but it is worth an entire section because of how many customers arrive at my shop with adapter problems. The G20 M340i is a 5x112 car. Adapters to run 5x120 F-chassis wheels are widely sold, and they work if you buy the right hardware and torque it correctly.
What adapter "correct" looks like
Hubcentric to both sides (72.56 mm vehicle-side, 66.5 mm wheel-side for F-chassis wheels on a G20). Forged 6061-T6 aluminum, not cast. Minimum 20 mm thickness - anything thinner than 20 mm cannot accommodate the F-chassis M14 studs and still have adequate stud engagement into the wheel. Includes replacement ball-seat or cone-seat bolts sized to the adapter thickness. Torque the adapter to the hub at 120 Nm, then torque the wheel to the adapter at 120 Nm, recheck at 50 miles.
Why I still recommend against it
Even done right, adapters change the scrub radius of your car. The outer face of the wheel moves outward by the adapter thickness, which changes how the wheel steers over bumps and changes how the brakes load. On a stock G20 M340i the difference is small. On an M340i with the Pro brake, a 20 mm adapter puts a 19-inch wheel at a scrub radius that is visibly worse on broken pavement. It is not unsafe, but it is not ideal. And because every major brand sells 5x112 native fitments now, there is no good reason to take the tradeoff.
Promotive Spacers 5x120 to 5x112 Wheel Adapters 20mm — BMW
$56.99
Offset math - the actual calculation your wheel shop should be doing
Offset (ET) is the distance from the wheel's mounting face to its centerline in millimeters. Higher ET (ET40, ET45) means the mounting face is further outboard than centerline, which tucks the wheel inward toward the brake. Lower ET (ET20, ET25) means the mounting face is closer to the centerline, pushing the wheel outward toward the fender.
Here is the math for the F30 340i. Stock 442M front is 19x8 ET36. If you want to run a 19x8.5 aftermarket wheel and keep the same outboard face position, you run ET36 minus (half the width increase in mm). A 0.5-inch width increase is 12.7 mm, so half of that is 6.35 mm. New target ET is ET36 minus 6.35, which rounds to ET30. That is exactly why 19x8.5 ET30 is the standard F30 340i front fitment - it replicates the stock outboard position with a wider wheel.
For the G20 M340i, stock 792M front is 19x8 ET27. If you want 19x9 keeping outboard face position, (9 minus 8) x 25.4 / 2 equals 12.7 mm. ET27 minus 12.7 equals ET14. That is more outboard than most people realize they are going. Going to ET30 on a 19x9 tucks the wheel inward versus stock, which is actually what you want to avoid poking past the fender.
Worked example - staggered F30 340i
Target setup: 19x9 ET30 front, 19x10 ET25 rear, 245/35 and 275/30 Michelin PS4S. Stock 442M is 19x8 ET36 front and 19x8.5 ET40 rear. Front width increase is 1 inch = 25.4 mm, half is 12.7 mm. ET36 minus 12.7 is ET23.3. Running ET30 front means you are 6.7 mm inboard of stock position. Rear width increase is 1.5 inches = 38.1 mm, half is 19 mm. ET40 minus 19 is ET21. Running ET25 rear means you are 4 mm inboard of stock. Result - the wheels sit slightly tucked compared to stock 442M outboard face, which means they will not rub and they will not poke. Perfect daily-friendly staggered setup.
Worked example - square G20 M340i
Target setup: 19x9.5 ET25 square, 265/35 tires all around. Stock 792M front is 19x8 ET27. Width increase is 1.5 inches = 38.1 mm, half is 19 mm. ET27 minus 19 is ET8. Running ET25 square means you are 17 mm inboard of the stock front outboard position. Out back, stock 792M is 19x8.5 ET40. ET40 minus 12.7 (for the 1 inch width increase) is ET27.3. Running ET25 rear means you are 2.3 mm outboard of stock. Result - square setup tucks heavily up front versus stock, sits flush in the rear. This is the APEX recommended track setup.
StanceMagic M12x1.5 Extended Wheel Stud Conversion Kit — BMW (Pack of 20)
$43.19
F30 340i chassis picks - daily, show, aggressive, track
F30 340i daily driver
APEX ARC-8 flow-formed, 18x8.5 ET35 front, 18x9.5 ET45 rear in satin black or satin bronze. Priced around $1400-$1600 per set of four in 2026. Tire recommendation is Michelin Pilot Sport 4S in 245/40-18 and 275/35-18, which runs about $1400 for the set. Total investment $2800-$3000 rolling. Will drop roughly 8 pounds per corner over stock 407, no fender work, no spacers, no rubbing even on xDrive with H&R springs. This is the setup I put on my own old F30 335i test car three years running, and I have put at least a dozen customers on the same spec. Nobody has come back unhappy.
F30 340i show and stance
Vossen HF-3 or BBS CH-R in 20x9 ET30 front and 20x10 ET30 rear. Priced $3200-$4500 for the set. Tire is Michelin PS4S 245/30-20 and 275/30-20, $1500-$1700 installed. Total rolling cost around $5000. Requires a 15-20 mm drop on springs or coilovers to truly look the part. Clears the stock brake, clears the optional Brembo 370 mm F30 big brake kit at ET30 or higher.
F30 340i aggressive daily
Forgestar F14 in 19x9 ET32 front and 19x10 ET28 rear. $1800-$2400 for the set. 245/35-19 and 275/30-19 Michelin PS4S, $1500 installed. Total around $3500-$4000. Clears the stock F30 brakes, fits flush at a 15 mm drop, just poke on stock ride height. The F14 Super Deep Concave profile makes the car look three inches wider than it is.
F30 340i track and HPDE
APEX ARC-8R forged 18x9.5 ET35 square in satin black. $2600-$3000 for the wheels. Mount a 275/35-18 Toyo R888R or Michelin PS Cup 2, roughly $1400-$1800 for the tire set. Total $4000-$4800 rolling. 18 pounds per wheel saves 44 pounds of unsprung mass over stock Style 407. Fits the 370 mm F30 big brake kit at ET35. Track day tires rotate corner-to-corner for even wear.
G20 M340i chassis picks - daily, show, sleeper performance
G20 M340i daily driver (no Pro brake)
APEX VS-5RS 19x9 ET30 front, 19x10 ET30 rear, or Vossen HF-3 in the same sizes. Set pricing is $3800-$5000 depending on brand. Michelin PS4S 245/35-19 and 275/30-19 tires, $1400-$1600 installed. Total around $5500-$6600 rolling. Drops 5-7 pounds per corner versus stock 792M. Clears the stock 348 mm brake, clears the optional Pro brake at a marginal clearance - verify before buying if you have Pro.
G20 M340i daily driver (with Pro brake)
APEX VS-5RS 19x9.5 ET42 front, 19x10.5 ET35 rear, or Titan 7 T-R10 in 19x9 ET42 and 19x10 ET35. $4000-$5200 for the set. Same tire spec, same total cost. ET42 front specifically engineered for Pro brake clearance. This is the correct answer for a 2022+ M340i with M Sport Pro.
G20 M340i show and stance
Vossen HF-5 Gloss Black in 20x9 ET30 front (or ET38 for Pro brake) and 20x10.5 ET30 rear. $4200-$5500 for the set. Michelin PS4S 255/30-20 and 285/30-20 at $1800 installed. Total around $6500. This is the photographed standard, the G20 M340i on Vossen HF-5 Gloss Black is by far the most shared look on bimmerpost, reddit r/BMW, and Instagram BMW hashtags in 2024 and 2025.
G20 M340i sleeper performance
Titan 7 T-R10 in 19x9.5 ET25 square in Techna Bronze, or APEX SM-10RS in the same spec. $3500-$4200 set. Michelin Pilot Sport 5 in 265/35-19 all four corners, $1400 installed. Total around $5000 rolling. Square setup means tires rotate, unsprung weight drops 25-plus pounds total versus stock 792M, and the understated bronze finish keeps the car looking nearly stock. Autocross lap times fall 2-3 seconds on a 90-second course over stock wheels and 4S tires. This is the setup I would personally run on an M340i xDrive if it were my daily.
19" Gloss Black Forged Wheels Style 826 — G20/G22 3 & 4 Series
$1,999.00
Weight, unsprung mass, and what 11 pounds actually does
Unsprung weight - the rotating mass at the wheel that is not supported by the suspension springs - has an outsized effect on ride quality, steering response, and acceleration. Engineers estimate 1 pound of unsprung weight reduction feels like 5-7 pounds of sprung weight reduction. On a 340i, dropping from 29-pound stock wheels to 18-pound forged wheels takes 44 pounds total off the axles, which subjectively feels like 220-300 pounds off the car.
What the driver actually notices
Three things in order of obviousness. First, the ride gets more compliant over expansion joints and broken pavement because the wheel rebounds faster into the hole and out of it, giving the spring less work. Second, steering response sharpens because the front wheels have less rotational inertia to overcome when you input a steering change. Third, acceleration improves marginally because engine torque has less rotating mass to spin up. On a Car and Driver test of a BMW M3 with forged wheels versus stock cast, the forged setup shaved 0.1 second off the 0-60 time. That is real.
The weight numbers you should know
F30 OEM Style 407 - 29 pounds per corner. APEX ARC-8R forged - 18 pounds. Savings, 11 pounds per corner, 44 pounds total. G20 OEM Style 792M - 28-29 pounds per corner. APEX VS-5RS forged - 20 pounds. Savings, 8-9 pounds per corner, 32-36 pounds total. G20 OEM Style 795M 20-inch - 32-34 pounds per corner. Vossen HF-3 20-inch - 26-28 pounds. Savings, 6-8 pounds per corner, 24-32 pounds total.
Flow-formed wheels save roughly 10 percent over OEM cast. Forged wheels save roughly 25-30 percent over OEM cast. The more you spend, the more you save. Which is why a forged VS-5RS at $1000 per wheel is a better long-term investment than a cast replica at $400 per wheel, even though the replica is cheaper up front.
Spacers and extended studs - when and how
Spacers shift a wheel outboard by the spacer thickness. If your stock 792M has an outboard face at a specific position, adding a 10 mm spacer moves the face 10 mm further outboard, giving you more stance. The catch is that spacers also require longer lug hardware because the wheel is further away from the hub by the spacer thickness.
F30 340i spacer setup
For the F30, a common setup is 12-15 mm rear spacers to push the rear wheel flush on a stock 442M staggered setup. At 15 mm, you need extended lug bolts 10 mm longer than stock (so 37 mm or 40 mm bolts for a factory 25 mm). Use hubcentric forged aluminum spacers rated for the F30's load, with a 72.56 mm hub bore to both sides. Turner Motorsport and Renn Motorsport are the brands I trust. Avoid generic Amazon spacers without published torque specs.
Turner Motorsport 12MM Wheel Spacers with Extended Lugs BMW 3 5 6 Series E46 E90 E92 E63 E64
$59.99
G20 M340i spacer setup
For the G20, spacers require a different approach because the factory lug studs are M14x1.25 and you typically need to switch to a wheel stud system before spacer thickness exceeds 12 mm. The process - remove factory lug bolts, press in M14x1.25 wheel studs (typically 90-100 mm long), bolt the spacer to the hub using the studs, then run a shorter lug nut on the wheel side. This is a permanent conversion but it is the correct approach for spacers above 12 mm thickness on a G20.
For spacers up to 12 mm on a G20, you can use extended lug bolts instead of a stud conversion. Sucoso M14x1.25 45 mm conical-seat bolts work for up to 15 mm of spacing. Beyond that, stud conversion is the only safe option.
KSP 15mm Hubcentric Wheel Spacers 5x112 — G-Chassis BMW (2019+)
$45.99
Hubcentric rings - when you need them
If your new wheels have a larger hub bore than your chassis (for example, a wheel with a 72.6 mm bore going on a G20 M340i with a 66.5 mm hub), you need hubcentric rings to center the wheel properly. Without them, the wheel is centered only by the lug bolts, which leads to vibration and uneven wheel wear. Most reputable brands ship hubcentric rings with the wheels. Verify before installation. If they are not included, a plastic or aluminum hubcentric ring set costs $15-$30.
Tire pairing for 340i wheels
Wheels and tires are a package. A $5000 set of forged wheels on $600 no-name all-season tires is not going to feel like a $5000 upgrade. Here is the tire spec I pair with each use case.
Daily and daily-aggressive
Michelin Pilot Sport 4S is the default - excellent wet and dry grip, 30,000 mile tread life if you do not beat on it, $280-$360 per tire in 2026. Pilot Sport 5 is the newer generation, slightly more expensive, slightly better wet grip, same tread life. Continental ExtremeContact DWS06 Plus is the all-season alternative, cheaper, gives up some dry grip for the all-season compound.
Show and stance
Michelin Pilot Sport 4S or Continental Sport Contact 6. Both summer performance tires, both work well on 20-inch wheels with short sidewalls. Expect to pay a premium for the short sidewall (255/30-20 is more expensive than 275/35-19). Tread life drops to 20,000-25,000 miles at these sizes because the softer compound works harder on the thinner sidewall.
Track and HPDE
Michelin Pilot Sport Cup 2 for a dual-duty street and track tire. Toyo R888R or Nankang AR-1 for a dedicated track tire. Budget $1500-$2200 for a track tire set. Expect 10-20 track days per set depending on driver aggression and track surface.
FAQ - the 15 questions 340i owners actually ask
What bolt pattern does the BMW 340i use?
The F30 340i (2016-2019) uses a 5x120 bolt pattern with a 72.56 mm hub bore and M12x1.5 lug bolts. The G20 M340i (2019+) uses a 5x112 bolt pattern with a 66.5 mm hub bore and M14x1.25 lug bolts. These are two different bolt patterns that are not interchangeable without adapters.
Do F30 340i wheels fit a G20 M340i?
No. The bolt pattern changed from 5x120 to 5x112, the hub bore dropped from 72.56 mm to 66.5 mm, and the lug thread pitch changed from M12x1.5 to M14x1.25. F30 wheels cannot bolt to a G20 chassis without hubcentric adapters, and adapters are not recommended for new wheel purchases.
What is the best wheel size for a BMW 340i?
For a daily driver, 18-inch wheels give the best ride quality and are the cheapest to replace tires on. 19-inch is the best compromise for daily and show, which is why BMW ships most M Sport and M340i cars on 19s. 20-inch is show-car territory, looks best but sacrifices ride quality. Track cars use 18-inch for sidewall flex and tire availability.
What OEM wheels come on the F30 340i?
The F30 340i typically ships with Style 397M or 400M 18-inch wheels as base M Sport, or Style 403M/442M 19-inch as the optional upgrade. Style 407 19-inch is also common on pre-LCI cars. All are 5x120 with 72.56 mm bore.
What wheels come standard on the G20 M340i?
The G20 M340i base comes on Style 790M 18-inch wheels. Most US-market M340i cars shipped with Style 792M 19-inch (Cerium Grey) through 2022, then Style 827M 19-inch on LCI cars. Style 795M 20-inch was the M Performance option.
How much do stock BMW 340i wheels weigh?
F30 Style 407 19-inch weighs approximately 29 pounds per corner. F30 Style 400M 18-inch weighs approximately 24 pounds. G20 Style 792M 19-inch weighs 28-29 pounds. G20 Style 795M 20-inch weighs 32-34 pounds. Flow-formed aftermarket typically saves 3-5 pounds per corner. Forged typically saves 8-11 pounds per corner.
Are forged wheels worth it on a 340i?
For daily driving, flow-formed wheels at $300-$500 each give 80 percent of the benefit of forged at 40 percent of the cost. For track use, autocross, or HPDE, forged is worth the premium because the stiffness, impact resistance, and weight savings are real and measurable. If you are tracking the car, buy forged.
Can I run square fitment on a 340i xDrive?
Yes, but verify the rolling circumference stays within 1-2 percent of stock staggered circumference. The xDrive transfer case does not tolerate more than a few percent difference between front and rear tire diameter long-term. A square setup with matched-diameter tires (for example 245/40-18 front and rear, or 275/35-18 front and rear) works fine on xDrive as long as circumference is close to stock.
Do I need spacers for aftermarket wheels on a 340i?
Depends on the wheel offset you chose. A wheel with ET30 on an F30 340i typically sits flush without spacers. A wheel with ET40 or higher usually needs a 10-15 mm spacer to fill the fender. Buy the correct offset first, use spacers only as a fine-tune tool, not as a primary fitment solution.
What size tires fit a 340i on 19-inch wheels?
F30 340i on 19x8.5 ET35 fits 245/40-19. F30 on 19x9.5 ET35 fits 265/35-19 or 275/35-19. G20 M340i on 19x9 ET30 fits 245/35-19 or 255/35-19. G20 on 19x10 ET30 fits 275/30-19 or 285/30-19. Always verify with your chosen tire model, different manufacturers have slightly different sidewall bulge profiles.
What is the hub bore on a BMW G20 M340i?
66.5 mm. Some wheel spec sheets list 66.6, that is the same hub. Wheels with a 72.6 mm bore (F30 spec) need hubcentric rings to fit properly on a G20.
Will 5x120 wheels fit a G20 M340i with adapters?
Physically yes, with hubcentric adapters of 20 mm minimum thickness and M14x1.25 to M12x1.5 stud hardware. I do not recommend it for new wheel purchases because every major wheel brand now offers 5x112 native fitments for G-chassis BMWs. Adapters are only justified if you want to run a specific OEM wheel (F80 M3 forged, for example) on a G20 chassis.
How much does it cost to replace all four wheels on a 340i?
Budget replica wheels, $800-$1400 for the set. Value flow-formed (Konig, AG M540, Curva C300), $1400-$2200. Premium flow-formed (APEX ARC-8, BBS CH-R, Vossen HF-3, HRE FF04), $2200-$3600. Entry forged (APEX ARC-8R, Titan 7, APEX SM-10RS), $3600-$5500. Mid forged (APEX VS-5RS, Forgestar F14), $5500-$9000. Premium forged (BBS LM, HRE Classic), $9000-$15000. Add $1400-$1900 for a tire set.
What is the best staggered wheel setup for an F30 340i?
19x8.5 ET35 front and 19x9.5 ET45 rear replicates the OEM 442M stance with slightly wider rims. 19x9 ET30 front and 19x10 ET30 rear is the more aggressive daily-friendly staggered spec. 245/40 or 245/35 front and 275/35 or 275/30 rear on either setup.
Do I need to reprogram TPMS after changing wheels on a 340i?
If your new wheels have TPMS sensors that match your car's specification (433 MHz for 2018+ US-market BMWs, 315 MHz for older cars), the car will auto-learn the new sensors within 10-20 miles of driving. If the wheels do not have TPMS sensors, the warning light stays on until you install sensors. Generic TPMS sensors cost $30-$60 each and are programmable at most tire shops.
Common mistakes I see at the shop
Wrong bolt pattern
The most expensive mistake. A customer buys a "smoking deal" on a set of 5x120 wheels off bimmerpost for their new M340i, ships them in, and discovers on install day that nothing lines up. Always verify bolt pattern before purchase. G20 M340i is 5x112, full stop.
Ignoring the Pro brake clearance
Second most expensive. Customer buys 19x9 ET30 for their 2023 M340i with M Sport Pro, test-fits the wheel, and it hits the caliper. Now they are stuck with four wheels they cannot use, and the wheel company has a restocking fee on returns. Always verify your brake spec before ordering. If it is Pro, ET42 minimum up front on 19, ET38 minimum on 20.
Non-hubcentric adapters
Customer buys $60 eBay adapters, bolts up fine, drives 20 miles, feels a vibration at 50 mph. The adapters centered on the lug bolts rather than the hub, which is wrong. A proper hubcentric adapter centers on the hub and the lug bolts just clamp it. Cheap adapters save $200 up front and cost $500 in brake pad replacement over a year because of uneven wear.
Counterfeit wheels
Fake APEX, fake Vossen, fake BBS - all over Facebook Marketplace, Alibaba, and some sketchy eBay sellers. Counterfeit flow-formed wheels use cheaper alloy, inferior QC, and fail catastrophically under load. I have seen a counterfeit "BBS CH-R" crack cleanly in half after hitting a pothole at 40 mph. Buy from authorized dealers. APEX, Vossen, and BBS all list authorized retailers on their websites.
Skipping the torque re-check
Install day torque of 120 Nm is correct. What most people skip is the 50-100 mile re-torque. New wheels seat differently on the hub as they settle, and lug bolts can lose a few Nm in the first week. Re-torque all four wheels after a week. This takes five minutes and prevents a wheel from coming loose.
Buying wheels before tires
Tire choice drives wheel width. A 245-width tire wants a 8-9 inch rim. A 275-width tire wants a 9-10.5 inch rim. Buying a 19x10 wheel and then trying to fit a 245 tire on it gives you a stretched tire that looks bad and handles worse. Decide on tire size first, then pick the appropriate wheel width.
Verdict - what I would actually buy
If you have an F30 340i and you want one set of wheels for life, the answer is APEX ARC-8R forged in 18x9.5 ET35 satin bronze, Michelin Pilot Sport 4S in 275/35-18. Track-capable, daily-friendly, 44 pounds off the unsprung mass, looks good, will outlast the car. Total investment around $4000 rolling.
If you have a G20 M340i without the Pro brake, the answer is APEX VS-5RS 19x9 ET30 front and 19x10 ET30 rear in Anthracite or Satin Bronze, Michelin PS4S 245/35-19 and 275/30-19. $5500-$6000 rolling. Looks right, drives better than stock, holds up to spirited driving.
If you have a G20 M340i with the Pro brake, the answer is APEX VS-5RS 19x9.5 ET42 front and 19x10.5 ET35 rear in the same finish, same tire spec, same total cost. The ET42 front is the Pro-brake-safe offset and it does not compromise the look.
If you want the show-car win, it is Vossen HF-5 Gloss Black in 20x9 ET38 front and 20x10.5 ET38 rear on the M340i, or 20x10 ET30 staggered on the F30. The most photographed setup on bimmerpost in 2024 and 2025. Pairs beautifully with Alpine White, Sunset Orange, or Tanzanite Blue paint.
If you are on a budget and want something lighter than stock without the forged price, AG M540 in 19x9 front and 19x10 rear for either chassis, or Curva Concepts C300 in the same spec. Under $1800 for the set, flow-formed, better than stock, will not embarrass you at a BMW meet.
Whatever you buy, buy the correct bolt pattern. Verify your brake spec. Get the offset right. Torque to 120 Nm, re-torque after 50 miles, and enjoy the car. I have been doing BMW wheels for 5 years and the cars that look best are the ones where the owner did their homework before buying. Go do yours. For related reading, my best wheels for BMW 335i guide covers the pre-340i F30 picks, best wheels for BMW M3 goes deeper on the forged tier, my BMW wheel spacers size guide covers the spacer math in detail, the BMW 340i mods guide covers what to do after you finish the wheels, and my full M340i review goes into depth on the stock car. If you run an F30 chassis, the F30 335i sleeper build guide is worth a read, and the 330i vs 340i comparison helps if you are still shopping. For G20 owners considering whether the M340i is the right variant, M340i vs M3 has the definitive answer.
