Approved Tires BMW Z4 M Roadster

1 variant · 1 configuration

Officially FEDRO-approved tire sizes for all BMW Z4 M Roadster variants.

342.7 CVessence

225/45 ZR18

Standard configuration

Front (AV)

225/45 ZR18

Width225 mm

Aspect ratio45%

Wheel8 x 18" ET 42

Offset (ET)42 mm

Rear (AR)

255/40 ZR18

Width255 mm

Aspect ratio40%

Wheel9 x 18" ET 30

Offset (ET)30 mm

Option 1

Front + Rear

225/40 R18 92V M+S

Width225 mm

Aspect ratio40%

Wheel7.5 x 18" ET 41

Offset (ET)41 mm

630 kg max240 km/hM+S

Rear (AR)

225/40 R18 92V M+S

Width225 mm

Aspect ratio40%

Wheel7.5 x 18" ET 20

Offset (ET)20 mm

630 kg max240 km/hM+S

Approved tires: official Swiss data

Every vehicle registered in Switzerland has a list of tire sizes approved by the Federal Roads Office (FEDRO). This data comes from type approvals (TARGA) and determines which tire sizes you can legally mount. Our tool displays standard and optional configurations with wheels, offset, load and speed ratings.

Why respect the approval?

Mounting non-approved tires can lead to inspection failure, fines, or even insurance cancellation in case of an accident. Always check that your tires match the approved sizes for your vehicle.