Hello. I have a Trek 4500 and it has been a great bike. I'm getting clipless pedals for it soon and new red grips. The only problem I have had with it has been low pedal clearence. I've taken my kick stand off so I know its not that. Over roots and log pyramids, the pedals sometimes smack the roots. It throws you off balence. I can hold the pedals parallel to the ground and their is know problem. But up rooty hills, it gets annoying. What can I do to fix this.