Mongoose Domain Men's Dual-Suspension Mountain Bike (26-Inch Wheels) 21-speed, all-terrain bike with lightweight aluminum frame Full suspension on front and back wheels provides more comfort and greater control Features SRAM ESP 3.0 grip shifters and a rear derailleur Ideal for men and women riders five feet or taller Features 26-inch aluminum wheel rims, MTB knobby tires, and a nimble racing suspension fork