Custom forged wheels for BMW M240i G42 (2021-present)
Technical specifications
- Production period
- 2021-present
Original fitment measurements: BMW M240i G42
The measurements of the car as delivered new, to identify yours and compare. Each value refers, by a number, to the sources that give it. They are not a recommendation: Onyx does not advise any specific offset.
Hub
| Measurement | Original value |
|---|---|
| PCD (bolt pattern) | 5x112 [1, 2, 3, 4] |
| Centre bore | 66.6 mm [2, 3, 4] |
| Thread | M14 x 1.25 [2, 3, 4] |
| Fixing | Wheel bolts [2, 3, 4] |
| Bolt or nut seat | Not published |
| Tightening torque | 140 Nm [2, 3, 4] |
“Not published”: no source gives it with the certainty we require at this stage (see the rule below).
Original fitments by version
| Version and fitment | Front | Rear | ||||||
|---|---|---|---|---|---|---|---|---|
| Diameter | Width | Original offset (manufacturer) | Tyre | Diameter | Width | Original offset (manufacturer) | Tyre | |
| M240i xDrive Coupé, 275 kW, 19 inches, original equipment | 19″ [5, 6, 7, 8] | 8J [5, 6, 7, 8] | ET 27 [5, 6, 7, 8] | 225/40 R19 [5, 6, 7, 8] | 19″ [5, 6, 7, 8] | 8.5J [5, 6, 7, 8] | ET 40 [5, 6, 7, 8] | 255/35 R19 [5, 6, 7, 8] |
| M240i xDrive Coupé, 275 kW, 19 inches, 8.5J and 9.5J, original equipment | 19″ [5, 6, 7, 8] | 8.5J [5, 6, 7, 8] | ET 25 [5, 6, 7, 8] | 245/35 R19 [5, 6, 7, 8] | 19″ [5, 6, 7, 8] | 9.5J [5, 6, 7, 8] | ET 35 [5, 6, 7, 8] | 255/35 R19 [5, 6, 7, 8] |
| M240i xDrive Coupé, 275 kW, 20 inches, original equipment | 20″ [5, 6, 7, 8] | 8J [5, 6, 7, 8] | ET 27 [5, 6, 7, 8] | 225/35 R20 [5, 6, 7, 8] | 20″ [5, 6, 7, 8] | 8.5J [5, 6, 7, 8] | ET 40 [5, 6, 7, 8] | 255/30 R20 [5, 6, 7, 8] |
| M240i xDrive Coupé, 275 kW, 18 inches, winter tyres, original equipment (winter tyres) | 18″ [5, 6, 7, 8] | 7.5J [5, 6, 7, 8] | ET 25 [5, 6, 7, 8] | 225/45 R18 [5, 6, 7, 8] | 18″ [5, 6, 7, 8] | 7.5J [5, 6, 7, 8] | ET 25 [5, 6, 7, 8] | 225/45 R18 [5, 6, 7, 8] |
The offsets are the original ones, given by the manufacturer or by the sources cited; they help you identify your car's fitment.
What Onyx can make for the BMW M240i G42
Custom forged wheels in forged 6061-T6 aluminium, designed to JWL/VIA standards, in monoblock or two-piece construction; three-piece wheels are made on quotation.
The diameters below start at the smallest original diameter recorded on this car (18″) and go up to 24″.
| Diameter | Monoblock, set of four wheels | Two-piece, set of four wheels |
|---|---|---|
| 18″ | €3,200 Great Britain: £3,336 with UK import VAT | €4,300 Great Britain: £4,482 with UK import VAT |
| 19″ | €3,200 Great Britain: £3,336 with UK import VAT | €4,300 Great Britain: £4,482 with UK import VAT |
| 20″ | €3,300 Great Britain: £3,440.40 with UK import VAT | €4,400 Great Britain: £4,586.40 with UK import VAT |
| 21″ | €3,550 Great Britain: £3,700.80 with UK import VAT | €4,750 Great Britain: £4,951.20 with UK import VAT |
| 22″ | €3,750 Great Britain: £3,908.40 with UK import VAT | €5,200 Great Britain: £5,420.40 with UK import VAT |
| 23″ | €3,950 Great Britain: £4,117.20 with UK import VAT | €5,750 Great Britain: £5,992.80 with UK import VAT |
| 24″ | €4,100 Great Britain: £4,273.20 with UK import VAT | €6,300 Great Britain: £6,566.40 with UK import VAT |
Amounts in pounds: our checkout on 4 October 2026, before the carrier's clearance fee and any import duty. The amount shown at checkout is the one charged for your order.
Wheels delivered in 4 to 8 working weeks, shipping included, from full payment for an order on the website, or from the deposit for an order on quotation, and at the earliest from your approval of the measurements, the colour or the 3D render you asked for, under article 5.1 of the Terms and Conditions.
The offset and width of your wheels do not come from a table: the Onyx Forged design office calculates them for your car and your brakes, and submits them to you before machining.
Frequently asked questions: wheels for the BMW M240i G42
What are the original offsets for the wheels of a BMW M240i G42?
A staggered fitment, according to its Swiss vehicle type records: in 19 inches, 8J with an offset of 27 at the front and 8.5J with an offset of 40 at the rear, or 8.5J with an offset of 25 and 9.5J with an offset of 35; in 20 inches, 8J with an offset of 27 and 8.5J with an offset of 40. For winter, 7.5J x 18 with an offset of 25 on both axles. [5, 8]
Which tyres, and which load index, does a BMW M240i G42 take?
In 19 inches, 225/40 R19 with load index 93 at the front, i.e. 650 kg per tyre, and 255/35 R19 with load index 96 at the rear, i.e. 710 kg; in 20 inches, 225/35 R20 with load index 90 and 255/30 R20 with load index 92, i.e. 600 and 630 kg. [5, 8, 9]
What is the load per wheel on a BMW M240i G42?
Its Swiss vehicle type record gives it a permissible load of 1,090 kg on the front axle and 1,160 kg on the rear axle, i.e. 545 and 580 kg per wheel: the rear carries the most. The 255/35 R19 rear tyre with load index 96 carries 710 kg. [5, 9]
What PCD, centre bore and bolts does a BMW M240i G42 use?
The PCD is 5x112, the centre bore 66.6 mm, and the wheels are held by M14 x 1.25 bolts tightened to 140 Nm: koleso.ee and SCC give these measurements for the G42; hubcentric-rings.com gives the same PCD but a different centre bore, which we do not adopt. [1, 2, 3, 4]
Same fixing measurements
As original equipment, these cars have the same PCD, centre bore, thread and fixing as the BMW M240i G42: PCD 5x112, centre bore 66.6 mm, thread M14 x 1.25, fixing: wheel bolts.
- BMW i4 M50 (G26) (2021–2025)
- BMW M2 G87 (since 2023)
- BMW M340i G20 and G21 (since 2019)
- BMW M440i G22 and G23 (since 2020)
- BMW M5 F90 (2017–2023)
- BMW 1 Series F40 (2019–2024)
- BMW 3 Series G20 (since 2019)
- BMW X3 M F97 (2019–2024)
- BMW X4 M F98 (2019–2025)
- BMW X5 G05 (since 2018)
- BMW Z4 G29 (since 2018)
- MINI Cooper F56 (2014–2024)
Same fixing measurements; original diameters and offsets: see each car's page. The seat of the bolts or nuts, the width of the wheels and brake clearance are not compared here: this comparison is not an opinion on compatibility.
Sources for the measurements and answers
- hubcentric-rings.com, BMW 2 Series (“G42 Coupé (2022–)” row) (secondary source, consulted on 21 October 2026)
- koleso.ee, BMW 2 Series G42 [2021 .. 2024], M240i and M240i xDrive (secondary source, consulted on 21 October 2026)
- SCC Fahrzeugtechnik (spurverbreiterung.de), BMW 2er, type G42, 2021 onwards (secondary source, consulted on 21 October 2026)
- koleso.ee, BMW 2 Series G42 LCI [2024 .. 2025], M240i xDrive (secondary source, consulted on 21 October 2026)
- Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BX981 (BMW M240i xDrive Coupé, type G2C (G42), 275 kW, August 2021): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 21 October 2026)
- Swiss Federal Roads Office (ASTRA), vehicle type record no. 1BY914 (BMW M240i xDrive Coupé, type G2C (G42), 275 kW, December 2021): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 21 October 2026)
- Swiss Federal Roads Office (ASTRA), vehicle type record no. ABA751 (BMW M240i xDrive Coupé, type G2C (G42), 275 kW, December 2022): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 21 October 2026)
- Swiss Federal Roads Office (ASTRA), vehicle type record no. 1XZ660 (BMW M240i xDrive Coupé, type G2C (G42), 275 kW, May 2023): permitted tyre and wheel combinations (tyre, width x diameter, offset) and axle loads (primary source, consulted on 21 October 2026)
- Fiches-auto.fr, tyre load index table (index → kg) (reference table, for a conversion, consulted on 3 October 2026)
Publication rule: a measurement is shown only if a primary source gives it (a manufacturer's document, an official vehicle type record, an original parts catalogue, the maker of the original wheel) without another primary source contradicting it, or if two independent specialist sources agree without a primary source contradicting them. The press and forums do not count. Measurements checked on 21 October 2026 by the Onyx Forged design office.
Designs for this generation
Three models from our catalogue, forged to measure for your BMW M240i G42. The price is for a set of four wheels: it depends on the construction and the diameter.
OX-T5 SuperlightMonoblock · From €3,200 for a set of four wheelsGreat Britain: from £3,336 with UK import VAT
OX-Y7 VenomMonoblock · From €3,200 for a set of four wheelsGreat Britain: from £3,336 with UK import VAT
OX-D10 ImperialTwo-piece · From €4,300 for a set of four wheelsGreat Britain: from £4,482 with UK import VAT
Amounts in pounds: our checkout on 4 October 2026, before the carrier's clearance fee and any import duty. The amount shown at checkout is the one charged for your order.
Custom forged wheels for the BMW M240i G42
- Forged 6061-T6 aluminium
- 5-axis CNC machining
- Designed to JWL/VIA standards
- Fitment worked out for your BMW M240i G42
M240i G42: 5x112, a 66.6 mm hub, M14 x 1.25 bolts
The BMW M240i xDrive Coupé (G42), whose first Swiss vehicle type record dates from August 2021, is 5x112 on a 66.6 mm hub, with M14 x 1.25 wheel bolts tightened to 140 Nm: koleso.ee and SCC give these measurements, each cited in the table. hubcentric-rings.com gives the same PCD (bolt pattern) but a different centre bore, which we do not adopt: two databases against one, and we have not read a BMW document that settles the question. wheelfitment.eu has no record for this coupé.
A staggered fitment, in 19 and 20 inches
The vehicle type record of the Swiss Federal Roads Office (ASTRA), the document that sets the tyre and wheel combinations a car may carry, permits for the 275 kW M240i a staggered fitment, wider at the rear. In 19 inches: 8J with an offset of 27 at the front and 8.5J with an offset of 40 at the rear, with 225/40 R19 and 255/35 R19 tyres, or 8.5J with an offset of 25 and 9.5J with an offset of 35, with 245/35 R19 and 255/35 R19 tyres. In 20 inches: 8J with an offset of 27 and 8.5J with an offset of 40, with 225/35 R20 and 255/30 R20 tyres. For winter, it permits 7.5J x 18 with an offset of 25 on both axles. The record lists the front wheels in one field and the rear wheels in the next; the table pairs them in that order, as for the Z4 G29 and the GR Supra, which share this format.
The rear carries the most
The record gives a permissible load of 1,090 kg on the front axle and 1,160 kg on the rear axle, i.e. 545 and 580 kg per wheel: the more heavily loaded axle takes the wider wheel. The rear tyre must keep at least the load index of the original fitment, 96 for 255/35 R19 (reading a tyre (page in French)).
What these measurements say about a forged wheel
The offset positions the wheel in the wheel arch: a wider wheel, or a lower offset, brings it closer to the wing. The Onyx Forged design office starts from the measurements on this page, your brakes and your tyres to calculate the width and offset of your wheels, then submits them to you. The offset calculator compares two fitments: it compares, it does not choose the measurement for you.
Roadworthiness test: what is examined
The French roadworthiness test (contrôle technique) examines the wheel without removing it (cracks, deformation, a wheel that protrudes beyond the bodywork) and verifies that the tyre size is one provided for by the manufacturer or accepted as equivalent. Keeping a tyre size from the original fitment, and at least its load index, avoids having to justify it; the details are on the roadworthiness test and registration page.
What we record before machining
- The exact version, stated on the registration document, and the current diameter of your wheels.
- The braking system, on which the smallest possible diameter depends (wheels and brakes (page in French)).
- The current fitment, axle by axle, and the 66.6 mm hub bore.
Configure your forged wheels for the BMW M240i (G42)
The Onyx Forged design office works out the measurements of your car from its exact version, stated on the registration document, and shows them to you before machining. Each set is cut from forged 6061-T6 aluminium, machined on a 5-axis CNC centre, as monoblock, two-piece or three-piece wheels; our wheels are designed to JWL/VIA standards. Prices by diameter and the lead time are given on this page, under “What Onyx can make”. Start your configuration or write to contact@onyxforgedwheels.com.
Configure custom wheels for your BMW M240i G42: free 3D render, on request.