SEAT Mii wheel bolt & nut sizes
The SEAT Mii (2011 on) uses M12x1.5 wheel fixings with a R13 radius seat and a 17mm hex. It has 4 per wheel, so a full set is 16. 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 |
|---|---|---|---|---|---|---|---|---|
| 2011 on 4 per wheel | ||||||||
| KF1 (AA) | 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 SEAT Mii
Lost or damaged your locking wheel key? Find a replacement for your SEAT.
Common questions
What size are SEAT Mii wheel bolts?
SEAT Mii wheel fixings are M12x1.5 with a R13 radius seat and a 17mm hex.
How many wheel bolts does a SEAT Mii need?
4 per wheel, so 16 for a full set of four wheels.