Mongoose 26-in. Dolomite ALX Unisex Fat Tire Mountain Bike, GrayConquer any off-road trail with ease on the Dolomite ALX by Mongoose. This fat tire mountain bike with features a rigid aluminum frame and fork for lightweight strength. The rear derailleur with sixteen speeds makes hills easier to climb, while trigger shifters offer smooth gear changes. Mechanical disc brakes deliver superior stopping power in all conditions, so you��ll be ready for the trail. Plus, aluminum rims add strength without weighing you down. And don��t forget those tires. The Dolomite features massive 4-inch wide knobby mountain tires for maximum grip and stability, even on sand and snow. Get out there and take the trails by storm with the Dolomite ALX by Mongoose. Bike is sized by seat tube frame measurement. Medium should fit riders approximately 5 foot 7 inches to 5 foot 11 inches. See the Dolomite ALX in action. Big tires mean stability on rocky surfaces. Available in 3 frame sizes. Conquer any off-road trail with ease on this aluminum fat tire mountain bike. 26-inch wheels fit riders 64 to 74 inches tall. 16-speed trigger shifters provide effortless gear changes. Mechanical disc brakes deliver superior stopping power in all conditions. Rigid aluminum frame and fork provide lightweight strength. 26-inch wheels with 4-inch wide knobby mountain tires for go-anywhere traction. Frame size is determined from seat tube length See size chart for assistance