BMW 4 Series tire and wheel sizes
The BMW 4 Series was approved in Switzerland between 2013 and 2023 with tires from 225/55R16 to 255/35R20 on 16″, 17″, 18″, 19″, 20″ wheels. The most common sizes are 225/45R18, 255/40R18, 225/40R19. Some versions use different sizes front and rear (staggered fitment).
Sizes differ by engine, trim and market. Confirm with the tire placard (usually on the driver's door jamb), the owner's manual or the vehicle registration papers before buying tires or wheels.
Most common sizes
BMW 4 Series (2020–2023) type G3C
488 approved versions, e.g. 430i, 420d, M440i xDrive, 420i.
| Tire size | Axle | Load / speed | Rim and offset | Versions |
|---|---|---|---|---|
| 225/50R17 | Front & rear | 98Y | 7.5Jx17 ET30 | 404 |
| 225/45R18 | Front & rear | 95Y | 7.5Jx18 ET25 | 488 |
| 225/45R18 | Front | 95Y | 7.5Jx18 ET25 | 488 |
| 255/40R18 | Rear | 99Y | 8.5Jx18 ET40 | 488 |
| 225/40R19 | Front | 93Y | 8Jx19 ET27 | 488 |
| 255/35R19 | Rear | 96Y | 8.5Jx19 ET40 | 488 |
| 225/35R20 | Front | 90Y | 8Jx20 ET27 | 307 |
| 255/30R20 | Rear | 92Y | 8.5Jx20 ET40 | 307 |
BMW 4 Series (2021–2023) type G4C
187 approved versions, e.g. 430i xDrive, 420i, M440i xDrive, 420d xDrive.
BMW 4 Series (2013–2021) type 3C
1,472 approved versions, e.g. 420d, 420d xDrive, 420i, 440i xDrive.
| Tire size | Axle | Load / speed | Rim and offset | Versions |
|---|---|---|---|---|
| 225/55R16 | Front & rear | 95H | 7.5Jx16 ET37 | 237 |
| 225/50R17 | Front & rear | 94W | 7.5Jx17 ET37 | 883 |
| 225/45R18 | Front & rear | 91Y | 8Jx18 ET34 | 942 |
| 225/45R18 | Front | 91Y | 8Jx18 ET34 | 1138 |
| 255/40R18 | Rear | 95Y | 8.5Jx18 ET47 | 1138 |
| 225/40R19 | Front | 89Y | 8Jx19 ET36 | 1138 |
| 255/35R19 | Rear | 92Y | 8.5Jx19 ET47 | 1138 |
| 225/35R20 | Front | 90Y | 8Jx20 ET36 | 858 |
| 255/30R20 | Rear | 92Y | 8.5Jx20 ET47 | 858 |
How to read this table
Rim and offset uses the European notation: 7Jx17 ET45 is a 7-inch wide, 17-inch diameter wheel with a 45 mm offset. "Versions" is how many approved versions list that size — a rough guide to how common it is. Load / speed is the most frequent service description (for example 91V) among them; your car may require a higher one.
Showing 2,147 of 2,147 approvals: rare special versions are left out to keep the page readable. Records were read from the German-language text and checked against the French text; 100 % matched exactly.
Source: Swiss Federal Roads Office (FEDRO/ASTRA), open government data. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.