A tool for fitting a bicycle to a cyclist includes first and second stirrup elements, a handle, and attachment elements attaching the first and second stirrup elements to each other and to the handle. The cyclist may be positioned with the cyclist's back against a substantially flat surface and one leg extended away from the substantially flat surface and the foot of that leg engaging the first stirrup element and with the other leg bent and the foot of that leg engaging the second stirrup element. The cyclist may grasp the handle and pull the first stirrup element towards the cyclist's head to a position in which the cyclist's lumbo/sacral spine area moves away from the substantially flat surface.