I am getting ready to motorize a GX7. It has 29 inch, 48 spoke wheels. Is there a sprocket adapter that will fit this? My concern is not the hub diameter, but more the 48 spokes.
this is what you need to measure diameter of the hub.With all the spokes, it's hard to wrap a tape measure around it, but I got around 3 inches. It's a 7 speed derailleur on the back if that helps.