The car has an approval for the complete vehicle with certain combinations of wheel rims and tyres.
All wheel rims have a dimension designation, for example: 7.5Jx18x50.5.
7,5 | Rim width in inches |
| J | Rim flange profile |
18 | Rim diameter in inches |
50,5 | Off-set in mm (distance from wheel centre to wheel contact surface against the hub) |