Audi 80/90 wheel bolt & nut sizes
The Audi 80/90 (1978–1986) uses M12x1.5 wheel fixings with a R13 radius seat and a 17mm hex. Check the table below for the exact fixing for your year and wheel type.
Last updated 2 October 2026
Thread
M12x1.5
Seat
R13 radius
Hex size
17mm hex
Strength
Class 10.9
Sizes by year and wheel type
| Image | Model code | Wheel type | Thread | Length | Seat | Hex size | Finish | Strength |
|---|---|---|---|---|---|---|---|---|
| 1978–1986 4 or 5 per wheel: Most 4-stud; quattro 5-stud | ||||||||
| 81, (B2) | Steel & Alloy Wheels | M12x1.5 | 25mm | R13 radius | 17mm hex | Zinc | Class 10.9 |
A dash in the length column means no length is listed for that fixing. Not sure which wheels you have? Steel wheels usually have a plastic trim cover over them.
Locking wheel keys for the Audi 80/90
Lost or damaged your locking wheel key? Find a replacement for your Audi.
Common questions
What size are Audi 80/90 wheel bolts?
Audi 80/90 wheel fixings are M12x1.5 with a R13 radius seat and a 17mm hex.