This can be caused by various problems. It can be DISC_XY dummy oritentation or pivot point location offset from wheel dummy or even scaling on the dummy. Make sure DISC_XY dummy pivot point is correctly oriented on local axis (Y up, Z front) and both WHEEL_XY dummy and DISC_XY dummy are at the same location (preferably in the middle of the tire). Check the modding pipeline in SDK directory for info.