Designed to clear smaller wheels, or 17inch reverse barrel aka reverse-drop wheels (where the stepped barrel is on the back side of the wheel for a larger flat lip on the front side)  

Wheels such as 17inch VSKF, Style 32, Style5, Style 19, Z3M RoadStars etc.

Install these by removing the lower cone completely, and installing this 12.9class bolt upside-down in the same position, re-using the locknut by putting it into the SLR steering plate. 12point allows for proper torque and won't round out like an socket-cap(allen bolt)

The small bolt head will allow the same heim joint articulation as before with much more clearance.