Approved Tires QUATTRO R8 4.2FSI Spyder

1 variant · 1 configuration

Officially FEDRO-approved tire sizes for all QUATTRO R8 4.2FSI Spyder variants.

429.8 CVessence

235/40 ZR18

Standard configuration

Front (AV)

235/40 ZR18

Width235 mm

Aspect ratio40%

Wheel8.5 x 18" ET 42

Offset (ET)42 mm

Rear (AR)

285/35 ZR18

Width285 mm

Aspect ratio35%

Wheel10.5 x 18" ET 50

Offset (ET)50 mm

Option 1

Front (AV)

235/35 ZR19

Width235 mm

Aspect ratio35%

Wheel8.5 x 19" ET 42

Offset (ET)42 mm

Rear (AR)

295/30 ZR19

Width295 mm

Aspect ratio30%

Wheel11 x 19" ET 50

Offset (ET)50 mm

305/30 ZR19

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.