My rear sprocket was completely worn out and replaced at 4500 miles, the new one has a lip on each side and I've had no screeching from the belt since. No sign of wear so far in around 1200 miles .
Sounds promising.
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I can't see any need for a wider rear wheel, the grip seems fine to me (in all weathers ) and as mentioned a wider one would just add more weight .
With that argument, it would be even better to have an even narrower tyre/wheel than the ones on the front. Less weight is better, regardless, right?
My point was that they had to detune the engine, and while at it, narrowing the rear tyre. A wider rear tyre would make it possible to plant more power, but since the narrowing of the rear tyre is a consequence of breaking belts, a wider rear tyre is not going to happen in the foreseeable future. It would also work against it: Either have less ground contact, a detuned engine, and intact belts, or have more ground contact, a full-power engine to deliver the power, only to have the belt break sort of defeats the purpose.
