Hi everyone-
I'm putting a new disc front end on an old bike. Can anyone help me by measuring the size of the hole in their speedo drive?
My drive is a metal-bodied one drilled to fit the narrower old-school axle, so I'll need to bore it out. It won't fit over the new-style axle, and I can't tell what the diameter should be since I don't know where on the axle it needs to rest when assembled. (It has two diameters plus a short, tapered transition between them...)