These shoes fit both the 3 shoe flywheel and 2 shoe flywheel. The springs that come with the kits and the ones sold on the website will work with these.

A good starting point is a 2 shoe flywheel with aluminum shoes and 1.0 springs.

These shoes were part of an initial test run, and the hole for the flywheel pin will need to be enlarged slightly with a drill bit in order to fit.