Originally Posted by xlite
One of the fellows I did a bike for tried that product. He came back a few months later with a couple broken spokes. As Jim mentioned driving the hub instead of spokes should be less likely for this to happen. But only two cases of people coming back with broken hubs and both had hub drive. Both guys were a little heavy and there may be other factors at work because it seems these should be better not worse.
There is just no way Jim's adaptor could cause broken spokes. If installed properly it doesn't even touch the spokes. It drives strickly off the hub.
You say the guys that had the broken spokes were "A little heavy" What is a little heavy? The average bicycle wheel definitly has a certain weight limit. I imagine they were exceeding the limit for the stock spokes.