Trek's 3500 is a quality mountain bike ready for every adventure. Trek's aluminum frame is light for nimble handling, easy acceleration, and quick climbing. It's also built tough so it's fully capable of handing real XC trail riding. The 3500's 75mm-travel suspension fork dispatches bumps, rocks, and roots with ease, grace, and confidence. This trail-tamer delivers in the specs department too, with quick-shifting 21-speed Shimano gearing that makes easy work of the hills, and a set of Bontrager wheels with fat, knobby tires.