BMW i4 tire and wheel sizes
The BMW i4 was approved in Switzerland between 2021 and 2023 with tires from 245/45R18 to 255/35R20 on 18″, 19″, 20″ wheels. The most common sizes are 245/45R18, 255/35R20, 255/45R18. 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 i4 (2021–2023) type G4C
24 approved versions, e.g. i4 eDrive40, i4 M50, i4 eDrive35.
| Tire size | Axle | Load / speed | Rim and offset | Versions |
|---|---|---|---|---|
| 245/45R18 | Front & rear | 100H | 8.5Jx18 ET36 | 24 |
| 245/45R18 | Front | 100Y | 8.5Jx18 ET36 | 24 |
| 255/45R18 | Rear | 103Y | 9Jx18 ET42 | 24 |
| 245/40R19 | Front | 98Y | 8.5Jx19 ET35 | 24 |
| 255/40R19 | Rear | 100Y | 9Jx19 ET42 | 24 |
| 245/35R20 | Front | 95Y | 8.5Jx20 ET35 | 24 |
| 255/35R20 | Front | 97Y | 8.5Jx20 ET35 | 9 |
| 255/35R20 | Rear | 100Y | 9Jx20 ET42 | 24 |
| 285/30R20 | Rear | 99Y | 10Jx20 ET39 | 9 |
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 24 of 24 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.