Bikeberry.com sells a $35 OTS brand metal "rag joint" that replaces the 2 rubber donuts, and has slots for the spokes.
Originally Posted by ddesens
Yesterday, I had to re-adjust my rear sprocket/rag joint setup. The chain popped off twice in 12 hours. I'm beginning to really dislike the rag joint. Its nearly impossible to get this thing perfectly straight. My 1st bike I put over 200 miles on it before I had to tighten any bolts on it. The rubber discs are not cut with even thickness. One is more wedge like than the other. I had an extra kit so I tried to match up the 2 best rubber discs.