I have that hub on my bike. Once you figure out how and then get it adjusted properly it shouldn't slip or do anything like that. If you do decide to buy it don't bother with the included cable/shifter, the cable is WAY too long and the grip shifter is kind of ugly. Buy a trigger shifter and a cable (harris cyclery has them). Also Alfred E. Bike has them cheaper. +1 for the coaster brake model, I wish I would have gotten the coaster one. Take it off road, it'll be fine.