The sprocket adapter he sells looks nice, but I thought it was a bit expensive. So, I went to the hardware store and bought a large washer. I opened up the I.D. to slip fit over the hub, then drilled a set of 6 holes thru the sprocket/washer/spoke hub and bolded it up with some #8 screws. Total cost was about $3 for the big washer and the 6-#8 screws/washer/locknuts. Works perfectly, only requirement is access to a lathe (or a lot of work with a file) to open up the I.D. of the washer. I don't remember the O.D. of the washer, but it fit inside the spoke circle and kept the sprocket from hitting the spokes when everything was tightened down. Anyway, it's a option if you're a "do-it-yourselfer".