The wheel spacers are used to increase the vehicle track values. Increasing the track will add stability and will give to the car a more aggressive look.
5mm thickness NO CENTERING! Standard wheel bolts es 17 M12 - 1,25
The studs+nuts solution, compared to the classis nuts+bolts one, is very common in Motorsport because it allows a more efficient and quick change of the wheel.
Standard wheel bolts es es. 17 M12 - 1,25