Well at 4800 miles I had to have rear motor, hub and wheel replaced as it was cheaper than threading a new rim on old motor.   I had replaced most of the spokes by the 4800 mile mark and, in a effort to keep them from getting loose, I had over tightened the spokes and damaged the rim.    So now 300 miles on new wheel, a spoke broke, I decided to bring it in to have a proper fix and today 200 miles later another spoke has broken.     I ride the radwagon only on streets, but they do have potholes.   Average weight on bike is 320lbs with me and  cargo.      So this is a major issue I have with bicycles, if you look online as to average spoke breakage, even with proper adjustments, it is expected that 5 spoke will break in 6000miles.     Can you imagine motorcycle and even cars that have spoked wheels have to replace spokes that often?   There would be a huge outcry.    Anyway, guess I'm back to pulling off rear wheel AGAIN and fixing it myself as I can't afford $99 repair cost + gas to get it fixed at shop every few 100 miles.