Let me start with....this may have been posted before. I didn't search...probably broke rule #1 of the forum.This is my first build from a bare frame and fork. Bought it unpainted and rusty from the Jefferson car show and swap meet. First thing was how to find center of frame to center rear wheel. Held the tire up and tape popped into my head. Measure center to center of frame, subtract half and mark tape. Now you have center !!!