The car has an approval for the complete vehicle. This means that certain combinations of wheel (wheel rim) and tyre are approved.
Wheels (rims) have a designation of dimensions, for example: 7Jx16x50.
| 7 | Rim width in inches |
| J | Rim flange profile |
| 16 | Rim diameter in inches |
| 50 | Off-set in mm (distance from wheel centre to wheel contact surface against the hub) |