Steel mountain-style frame and front suspension fork for a durable ride21-speed Revoshift twist shifters and Shimano rear derailleur provide a wide gear range and quick shiftsFront disc brake and rear linear pull brake combine for reliable all-condition stoppingLight and strong alloy rims add durability without weighing you downKnobby tread mountain tires are designed for the trailAlloy mountain crank means less pesky maintenance on your endTool-free adjustable seat post for easy height adjustments on the go