Approved Tires ALPINA B4 S Bi. Cabrio

2 variants · 1 configuration

Officially FEDRO-approved tire sizes for all ALPINA B4 S Bi. Cabrio variants.

451.5 CVessence

2 variants

245/30 ZR20

451.5 CV · 2 979 cc · essence · 1AF855440.6 CV · 2 979 cc · essence · 1AF840

Standard configuration

Front (AV)

245/30 ZR20

Width245 mm

Aspect ratio30%

Wheel8 x 20" ET 36

Offset (ET)36 mm

Rear (AR)

265/30 ZR20

Width265 mm

Aspect ratio30%

Wheel9 x 20" ET 47

Offset (ET)47 mm

Option 1

Front (AV)

225/45 R18 M+S

Width225 mm

Aspect ratio45%

Wheel8 x 18" ET 36

Offset (ET)36 mm

M+S

Rear (AR)

225/45 R18 M+S

Width225 mm

Aspect ratio45%

Wheel8 x 18" ET 34

Offset (ET)34 mm

M+S

Option 2

Front (AV)

245/35 R19 M+S

Width245 mm

Aspect ratio35%

Wheel8 x 19" ET 34

Offset (ET)34 mm

M+S

Rear (AR)

245/35 R19 M+S

Width245 mm

Aspect ratio35%

Wheel9 x 19" ET 47

Offset (ET)47 mm

M+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.