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BMW M340i Bolt Pattern: 5×112 Wheel Fitment Guide (2020–2026)
The BMW M340i bolt pattern is 5×112. All G20 M340i models use a 5×112 bolt pattern with a 66.6 mm center bore and M14×1.25 wheel bolts.
This guide covers BMW M340i bolt pattern, wheel size, center bore, offset, tire fitment and factory wheel specifications for the 2020–2026 G20 M340i.The G20 M340i is the 3 Series with the B58 six, M Sport brakes, and a staggered factory setup, and it has one of the deepest aftermarket followings of any modern BMW sedan. Every factory wheel shares the same offsets (ET25–27 front, ET40 rear), so aftermarket sizing starts from a consistent baseline. This guide covers US factory wheels for 2020-2026 cars, documented aftermarket setups, strut clearance up front, and which tire pairings work with xDrive.
About this guide: Fitment data is compiled from owner builds in public fitment galleries, cross-checked against vendor fitment documentation. Use it as research for your build; ride height, tires, and alignment are still your installer's call.
Pricing forged wheels for your M340i? Full sets from $2,500 in 18″, or $2,650 in 19″.See your exact price →
OEM Setups
Factory Wheel & Tire Configurations
Every G20 M340i shares the hub hardware below. Factory wheels are staggered, 7.5–8″ front and 8.5″ rear, and the offsets are the same across the 18″, 19″, and 20″ sizes, so the wheel style mostly changes the look, not the fitment.
G20 M340i Hub & Hardware Specs
All trims — 2020-2026
Bolt Pattern5×112
Center Bore66.6mm
Fastener TypeLug Bolts
Thread PitchM14×1.25
Seat Type60° Conical
Torque Spec103 lb-ft (140 Nm)
Factory OffsetET25–27 front / ET40 rear
BrakesM Sport, 4-piston front (348mm)
18″ M Wheels — Styles 790M / 848M
Standard at Launch — 2020-2022
Front Wheel18×7.5 ET25
Rear Wheel18×8.5 ET40
Front Tire225/45R18
Rear Tire255/40R18
Applies ToM340i & M340i xDrive
The M340i launched on 18″ M wheels with a staggered 225/45 front / 255/40 rear tire setup. All-season and winter sets run 225/45R18 on all four corners. BMW's 796M accessory wheel is the same size.
19″ M Wheels — Styles 791M / 792M / 797M / 995M
Optional — Standard Size on Later Cars
Front Wheel19×8 ET27
Rear Wheel19×8.5 ET40
Front Tire225/40R19
Rear Tire255/35R19
Applies ToM340i & M340i xDrive, all years
The 19″ option on pre-LCI cars (791M, 792M, 797M) and the 995M on 2023+ LCI cars, all the same size; BMW's 898M accessory wheel matches too. For 2025, BMW lists a 19×8 wheel on 225/40R19 all-season tires as standard, with the staggered 995M included in the Cooling and High Performance Tire Package.
20″ Accessory Wheels — Styles 794M / 795M
BMW Accessory
Front Wheel20×8 ET27
Rear Wheel20×8.5 ET40
Front Tire225/35R20
Rear Tire255/30R20
Applies ToM340i & M340i xDrive
BMW's 20″ accessory wheels, sold through dealers. Same widths and offsets as the 19″ wheels, on lower-profile tires.
Aftermarket Options
Aftermarket Wheel & Tire Configurations
The M340i's narrow factory wheels leave plenty of room: a 9″ front and 10″ rear bolt on at stock height. Going to a 9.5″ front is where strut clearance and camber come into play, and on xDrive cars the tire pairing matters as much as the wheel. Setups are split into square and staggered; the table compares them at a glance.
Wide front tires on 9.5″ wheels sit close to the strut, and some coilovers, such as KW Variant or ST and Öhlins Road & Track, reduce that clearance further. Builds in this range often add a 3–12mm front spacer; FMB can build that offset into the wheel.
xDrive tire pairings.
A large front-to-rear rolling diameter gap can strain the xDrive system over time. On 19×9 / 19×10 wheels, 255/35 + 275/35 is listed as RWD-only, while 235/40 + 265/35 and 255/35 + 285/30 are xDrive-compatible. Check the xDrive column before choosing tires.
Camber on 9.5″ square setups.
Vendors call for extra negative camber on 19×9.5 squares, about −2.2° front and −1.8° to −2° rear, to keep the tires off the fenders and struts. Plan for camber plates or an alignment if you go this wide.
Square Setup
Stanceflush → poke
OEM
Aggressive
Daily
Wheels (All 4)
19×9 ET28 (Front and Rear)
Tires
255/35R19 (All 4)
Sources
Well-documented
4 community
1 vendor
The easy square upgrade: a full inch wider than the stock 8″ front, with the face about 12mm further out. Vendors list it as fitting xDrive cars with no changes, and owner builds run it at stock height (including one with no spacers on M Performance brakes) and on lowering springs.
On documented buildsMichelin Pilot Sport 4S, Pirelli P Zero
Stanceflush → poke
OEM
Aggressive
Daily
Wheels (All 4)
19×9 ET25 (Front and Rear)
Tires
255/35R19 (All 4)
Sources
Well-documented
4 community
1 vendor
The same wheel 3mm further out, for a flusher look. Documented on owner builds at stock height with no rubbing, and listed by vendors as fitting xDrive cars with no changes. It's also the vendor pick for a winter wheel, on 255/35R19 winter tires.
On documented buildsMichelin Pilot Sport 4S, Michelin Pilot Sport All Season 4
Stanceflush → poke
OEM
Aggressive
Track
Wheels (All 4)
18×9 ET25 (Front and Rear)
Tires
255/40R18 (All 4)
Sources
Documented
1 community
1 vendor
The 18″ performance setup: a smaller, lighter wheel with a taller sidewall and a wide 255 tire on all four corners. Vendors list it as fitting xDrive cars with no changes, and it clears the M340i's factory brakes. 245/45R18 is the narrower tire option.
On documented buildsMichelin Pilot Sport 4S
Stanceflush → poke
OEM
Aggressive
Track
Wheels (All 4)
19×9.5 ET25 (Front and Rear)
Tires
265/35R19 (All 4)
Sources
Documented
1 community
1 vendor
A wide square track setup. Vendors call for extra negative camber (about −2.2° front and −2° rear) and note the 265 front tire sits close to the strut. Most builds add a 5–12mm front spacer, especially on coilovers; FMB can machine that offset into the front wheels instead.
On documented buildsHoosier Track Attack Pro
Stanceflush → poke
OEM
Aggressive
Show
Wheels (All 4)
19×9.5 ET22 (Front and Rear)
Tires
255/35R19 (All 4)
Sources
Well-documented
3 community
1 vendor
The most aggressive square setup documented here, with the face about 24mm out from stock for a flush-to-poke look. Owner builds run it on stock suspension and on lowering springs with no rubbing, but the front tire sits close to the strut. Vendors list the equivalent spec with extra negative camber (about −2.2° front, −1.8° rear). A 245/35R19 on the same wheel gives more clearance.
On documented buildsGeneral G-MAX RS, Toyo Extensa HP II
Staggered Setup
Most Popular
Stanceflush → poke
OEM
Aggressive
DailyRWD only
Front Wheels
19×9 ET25
Rear Wheels
19×10 ET38
Front Tires
255/35R19
Rear Tires
275/35R19
Sources
Well-documented
6 community
1 vendor
The most-documented setup on the M340i: a full inch wider than stock at both ends, with the front face about 15mm out and the rear about 21mm out. Vendors list it as fitting with no changes. The 255/275 tire pairing is RWD-only; xDrive cars run the same wheels on 235/40 + 265/35 or 255/35 + 285/30 tires instead (below).
On documented buildsMichelin Pilot Sport 4S, Michelin Pilot Sport 5, Continental ExtremeContact Sport 02, Bridgestone Potenza Sport
Stanceflush → poke
OEM
Aggressive
DailyRWD only
Front Wheels
19×9 ET28
Rear Wheels
19×10 ET38
Front Tires
255/35R19
Rear Tires
275/35R19
Sources
Well-documented
6 community
1 vendor
The same setup with the front 3mm further in, which leaves a little more room at the strut. Documented on as many owner builds as the ET25 version, including cars on stock suspension, lowering springs, and coilovers. Like the ET25 version, the 255/275 tires are RWD-only.
On documented buildsMichelin Pilot Sport 4S, Pirelli P Zero, Firestone Firehawk Indy 500, Falken Azenis FK510
Stanceflush → poke
OEM
Aggressive
Daily
Front Wheels
19×9 ET25
Rear Wheels
19×10 ET38
Front Tires
235/40R19
Rear Tires
265/35R19
Sources
Well-documented
4 community
1 vendor
The xDrive-friendly version of the Most Popular setup: the same wheels on 235/40 + 265/35 tires, which keeps the front-to-rear rolling diameter close to stock. Vendors list it as fitting with no changes, and owner builds run it on stock suspension and lowering springs.
On documented buildsMichelin Pilot Sport 4S, Continental ExtremeContact Sport 02, Michelin Pilot Sport All Season 4
Stanceflush → poke
OEM
Aggressive
Daily
Front Wheels
19×9 ET25
Rear Wheels
19×10 ET38
Front Tires
255/35R19
Rear Tires
285/30R19
Sources
Documented
1 community
1 vendor
The same wheels with the widest tire pairing that stays xDrive-compatible. The 255 front keeps a slightly taller sidewall like stock. Vendors note the 285 rear can poke or rub on lowered cars with tires that run wide.
On documented buildsMichelin Pilot Sport 4S
Stanceflush → poke
OEM
Aggressive
Show
Front Wheels
20×9 ET25
Rear Wheels
20×10 ET38
Front Tires
245/35R20
Rear Tires
275/30R20
Sources
Documented
1 community
1 vendor
The 20″ version of the Most Popular setup, with the same face positions and an xDrive-compatible tire pairing. Vendors list it as fitting with no changes; some tires that run wide need a small front spacer, and one documented build on Öhlins Road & Track coilovers added 12mm up front. FMB can machine that into the front wheels.
On documented buildsBridgestone Potenza Sport
★★★★★
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Built to the exact spec, not the closest one on a shelf. The setups above come from real M340is, and we CNC-machine every wheel to them directly. If a build needs a spacer to reach its offset, we machine that offset into the wheel instead.
Choose your setup.
This guide is built to give you what you need to pick a spec with confidence: documented M340i builds, tire sizes, and how each one fits. If you still have questions, we're happy to help before you order.
Engineering verification.
Our manufacturing partner confirms wheel specs, including bolt pattern, center bore, brake caliper clearance, backspacing and load rating.
Render approval.
You approve the design and final specs before we move forward with production.
Our fitment guarantee
Every set is guaranteed to mount on your M340i: 5×112 bolt pattern, bored to the 66.6mm hub, machined for the factory 60° conical lug bolts, and made to the exact width and offset you approved.
How a setup sits on your car also depends on ride height, tires and alignment, so choose with your plans in mind.
What are the factory wheel specs on the G20 M340i?
Every M340i uses a 5×112 bolt pattern and 66.6mm center bore, with a staggered factory setup. The 18″ wheels are 18×7.5 ET25 front / 18×8.5 ET40 rear on 225/45R18 and 255/40R18 tires. The 19″ wheels (791M, 792M, 797M, and the 995M on LCI cars) are 19×8 ET27 / 19×8.5 ET40 on 225/40R19 and 255/35R19. BMW's 20″ accessory wheels keep the 19″ widths and offsets.
What are the bolt pattern, center bore, and torque specs?
See the hub & hardware specs above: 5×112 bolt pattern, 66.6mm center bore, and M14×1.25 lug bolts (not nuts) with a 60° conical seat, torqued to 103 lb-ft (140 Nm). Conical-seat aftermarket wheels are a direct swap; ball-seat wheels need matching bolts.
What aftermarket wheel sizes fit the M340i at stock ride height?
The most-documented setup is 19×9 ET25 / 19×10 ET38 on 255/35 + 275/35 tires, with the ET28 front version close behind; vendors list both as fitting with no changes. For squares, owners running 19×9 ET25 or ET28 on 255/35R19 typically report no clearance changes at stock ride height. xDrive cars should use the xDrive-compatible tire pairings shown in the table.
Which tire sizes work with xDrive?
Vendors list 235/40 + 265/35 and 255/35 + 285/30 on 19×9 / 19×10 wheels, and 245/35 + 275/30 on 20″, as xDrive-compatible. The popular 255/35 + 275/35 pairing on 19″ wheels is listed as RWD-only. Square setups are fine on xDrive. The xDrive column in the table shows each setup.
Can I run a square setup on the M340i?
Yes, and the main advantage is rotating tires front to rear. 19×9 ET25 or ET28 on 255/35R19 is the most-documented square and bolts on at stock height. 18×9 ET25 on 255/40R18 is the smaller-wheel performance option. 19×9.5 squares are more aggressive and usually need extra negative camber.
Do I need to worry about brake caliper clearance?
Every M340i comes with M Sport brakes (4-piston front calipers on 348mm rotors). Vendors list 18″ wheels that clear them, and the documented setups here all clear the stock brakes. Spoke shape still matters, so clearance is checked for your exact wheel design before production.
What should I know about spacers on the M340i?
Spacers are common, mainly up front: some coilovers, such as KW Variant or ST and Öhlins Road & Track, sit closer to the tire, and wide front tires on 9.5″ wheels get close to the strut. Any spacer needs bolts longer by the spacer's thickness. FMB machines custom wheels to the effective offset directly, so the front spacer can be built into the wheel.
What are the best winter wheel options for the M340i?
BMW's winter sets use 18″ wheels on 225/45R18 tires on all four corners. A common aftermarket choice is a square 19×9 ET25 or ET28 on 255/35R19 winter tires such as the Pirelli Winter Sottozero 3, which works with xDrive and allows rotation.
Can I put G80 M3 wheels on the M340i?
They share the 5×112 bolt pattern, 66.6mm bore, and M14×1.25 conical lug bolts, so M3 wheels mount. The catch is offset and width: the M3's rear wheels are 10.5″ wide at ET20, which puts the rear face roughly 15mm further out than the most aggressive rear setup documented here. Expect rubbing without fender work.
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