Smart Fortwo wheel bolt & nut sizes
The Smart Fortwo (2014 on) uses M12x1.5 wheel fixings with a 60° taper 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
60° taper
Hex size
17mm hex
Strength
Class 10.9 (300)
Sizes by year and wheel type
| Image | Model code | Wheel type | Thread | Length | Seat | Hex size | Finish | Strength |
|---|---|---|---|---|---|---|---|---|
| 2014 on 4 per wheel | ||||||||
| 453 | Steel Wheels | M12x1.5 | 24mm | 60° taper | 17mm hex | Zinc | Class 10.9 (300) |
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 Smart Fortwo
Lost or damaged your locking wheel key? Find a replacement for your Smart.
Common questions
What size are Smart Fortwo wheel bolts?
Smart Fortwo wheel fixings are M12x1.5 with a 60° taper seat and a 17mm hex.
How many wheel bolts does a Smart Fortwo need?
4 per wheel, so 16 for a full set of four wheels.