This 29" Men's Schwinn Boundary Mountain Bike is a ride that can quench your thirst for aggressive trail riding that knows no limits. It features an aluminum mountain-style frame that's light and sturdy and the front suspension fork is built for soaking up huge bumps and rocky paths. It also has 21-speed Shimano EZ-Fire trigger shifters that work with the Shimano rear derailleur for smooth and easy gear changes wherever the ride takes you. And, the Schwinn mountain bike includes reliable mechanical disc brakes that ensure crisp all-condition stopping and precise speed control, while the aluminum crank ensures optimal gearing for peak performance. Additionally, the light and strong alloy rims add crucial durability, while knobby, 2.5-inch wide mountain tires are designed to handle everything in your path. Plus, the 29" Men's Schwinn Boundary Mountain Bike has an adjustable seat post, a padded seat and handlebar grips for sustained comfort and control.