Audi A8 wheel bolt & nut sizes
The Audi A8 (1994 on) uses M14x1.5 wheel fixings with a R13 radius or R14 radius seat and a 17mm hex. It has 5 per wheel, so a full set is 20. Check the table below for the exact fixing for your year and wheel type.
Last updated 2 October 2026
Thread
M14x1.5
Seat
R13 radius / R14 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 |
|---|---|---|---|---|---|---|---|---|
| 1994–2010 5 per wheel | ||||||||
| D2, Q2, D3 (4E), 4H | Steel & Alloy Wheels | M14x1.5 | 27mm | R13 radius | 17mm hex | Zinc | Class 10.9 |
| 2010 on 5 per wheel | ||||||||
| 4H, Armoured cars only | Steel & Alloy Wheels | M14x1.5 | 30mm | R14 radius | 17mm hex | Delta KL100 | 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 A8
Lost or damaged your locking wheel key? Find a replacement for your Audi.
Common questions
What size are Audi A8 wheel bolts?
Audi A8 wheel fixings are M14x1.5 with a R13 radius or R14 radius seat and a 17mm hex.
How many wheel bolts does a Audi A8 need?
5 per wheel, so 20 for a full set of four wheels.