Custom forged wheels for MG
Custom forged wheels for MG, based on the original measurements of each generation, sources cited. 6061-T6 aluminium, designed to JWL/VIA standards.
Why choose Onyx Forged for MG
- Forged 6061-T6 aluminium
- 5-axis CNC machining
- Designed to JWL/VIA standards
- Fitment worked out for your MG
MG wheels: the measurements of your generation, with their sources
The PCD (bolt pattern), the centre bore, the wheel fixing and the fitments change from one MG to another, and from one version to another within the same model. We only show a measurement if a source gives it: a manufacturer document, a vehicle type record, an original parts catalogue, or two independent specialist sources that agree. The measurements are published generation by generation, on the page for each car, where each measurement cites its source. The first page is that of the MG4.
An electric car weighs on its wheels
An electric car carries a heavy battery, and each wheel takes its share: what counts is the load per wheel, not how the car looks. The wheel must withstand this load, and the tyre must have at least the load index of the original fitment; the page for each generation gives the permissible load per axle and the load index of the original tyres, with their source. The guide heavy SUVs: what load must the wheel withstand? (page in French) explains the calculation, and electric car tyres (page in French) what difference wear, the HL marking, noise and range make. A guide also explains what the diameter changes (page in French); the offset calculator compares the position of two wheels, it recommends no offset.
Why we record your car's measurements
An Onyx wheel is machined to the PCD and centre bore of the car it is made for: it centres on the hub with no ring or spacer. Enter your model, its model year and its version in the configurator: the Onyx Forged design office records the measurements, calculates the width and offset for your car and your brakes, and submits them to you before machining.
An Onyx forged wheel is 5-axis CNC machined from a block of forged 6061-T6 aluminium, instead of being cast in a mould, and designed to JWL/VIA standards. The forged, cast or flow formed page explains what this changes for weight and strength. Price and lead time each have their own page: custom forged wheel prices and lead time.
Frequently asked questions about MG wheels
Which wheel size for my MG?
The one for your model, your generation and your version. The size is shown on the sidewall of your tyres (reading a tyre (page in French)); the original fitments, with their width, their offset and the tyre that suits them, are on your generation's page when it exists on the site.
Do forged wheels for an MG have an approval of their own, and do they pass the roadworthiness test?
No: made one set at a time, Onyx wheels have no individual approval of their own, and we say so before the order. They are designed to JWL/VIA standards. The French roadworthiness test (contrôle technique) examines the wheel without removing it (cracks, deformation, a wheel that sticks out beyond the bodywork) and checks that the tyre size is provided for by the manufacturer or accepted as equivalent; it neither validates nor rejects a modification, which is a matter for vehicle approval (réception) and the registration document. The details, country by country, are on the roadworthiness test and registration page.
And if my MG is not on the list?
An Onyx wheel is designed around the measurements of the car it goes on. Enter your model and its model year in the configurator: we record your car's measurements and submit them to you before machining.
Tools and guides for choosing MG wheels
- Tyre size equivalence: compare two tyre sizes.
- Wheel offset calculator: compare the position of two wheels.
- Wheel and tyre sizes: how to read every marking
- Wheel PCD and centre bore: reading and measuring them
- Wheel nuts: types, tightening torque, locking wheel nuts (page in French)
- A second set of wheels for winter (page in French)
Configure your custom MG wheels
Enter your MG and its model year: we record its measurements and submit them to you before machining, with a 3D render on request. Configure your custom wheels.
Our MG wheels by model
PCD, centre bore, thread, diameters and original offsets: the MG cars we cover
One row per generation. Each value is taken from the car's page, which cites the source of each measurement, its fitments version by version and their original offsets (manufacturer). When a PCD has its own page, it leads there: that page lists every car that shares it.
| Car | PCD, centre bore, thread | Original diameters | Original offsets (manufacturer) | Onyx entry price, set of four wheels | Sources for these measurements |
|---|---|---|---|---|---|
| MG MG4 first generation (2022-present) | 5x112 · 57.1 mm · M14 x 1.5 | 16, 17, 18 inches | ET 41 to ET 51 | €3,200 (18″) Great Britain: £3,336 with UK import VAT | 11 sources, including 8 primary |
Generation by generation
MG MG4 first generation (2022-present): 7 original fitments recorded, 16 to 18 inches. Versions: MG4 rear-wheel drive, 125 kW; MG4 rear-wheel drive, 150 kW; MG4 rear-wheel drive, 180 kW; MG4 all-wheel drive, 320 kW. Fitments: 16-inch, 6.5J ET 41 (tyres 205/60 R16); 17-inch, 7J ET 51 (tyres 215/50 R17); 18-inch, 8J ET 51 (tyres 235/45 R18).
“—”: measurement not published for lack of a sufficient source. The diameters and offsets are those of the original fitments, all versions together: the car's page gives the fitment of each version. These measurements help you recognise your car; they are not a recommendation, and Onyx does not advise any specific offset.
Onyx entry price: the set of four monoblock forged wheels in the smallest diameter of our price list that covers the smallest original diameter recorded; the other diameters and the two-piece construction are on each generation's page. 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.
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 20 October 2026.
Configure custom wheels for your MG: free 3D render, on request.