So its a simple question . how has your guys front tired been wearing down? i seem to chew one up every season. and the tread dont even seem to ware down much. but the tire looses its structure and starts collapsing on its self. my assumption is that 1 being a 400lbs rider with a heavy bike puts accelerated ware on it while braking but still i wouldn't think id chew em up that fast. is this normal for any one else?