Roadmaster Granite Peak Men's Mountain Bike, 26 In. wheels, Black/Blue: Designed with 26" wheels, this bike fits riders 5'4" to 6'2" in height Steel mountain frame and front suspension fork offer a smooth ride 18-speed twist shifters offer smooth shifting on the trail Front and rear linear-pull brakes for quick, crisp stopping Alloy wheels and strong 3-piece mountain crank add durability Tool-free adjustable seat post for easy height adjustments Padded seat, handlebars with comfort grip Knobby tire treads