I just completed a six day, 350+ mile, ride of the C&O canal and GAP trail from Washington DC to Pittsburgh PA. The XDuro performed nicely except for one thing: The C&O was very muddy and the mud got kicked up from the front tires to the housing unit of the motor. From there it worked itself around to the front chain wheel and from there to the rear derailleur where it promptly deposited piles of mud which, in turn, prevented me from shifting gears until the mud was washed out. Possible fixes: 1) longer fenders for the front tires; 2) better design of the housing so the mud doesn't naturally flow onto the front chain wheel.