Lightweight aluminum mountain-style frame and front suspension fork provide a durable, responsive ride. 21-speed drivetrain with Shimano front and rear derailleurs and Revo twist shifters deliver quick, precise gear changes. Front disc brake and rear linear pull brake combine for reliable all-condition stopping. Light and strong high profile alloy rims add durability without weighing you down. Knobby mountain tires deliver improved traction and tough riding on varying terrain. Tool-free adjustable seat post provides easy height adjustments on the go. Designed with 29-inch wheels, this bike fits riders 5 feet 4 inches to 6 feet 2 inches tall.