Mongoose Men's Mech Mountain Bike Aluminum MTB frame with Hydro formed tubing is strong and durable; front suspension fork smooth's out bumps and thumps on the trail Front and rear v-brakes ensure quick stops out on the trail 21 speeds with Shimano rear derailleur for easy shifting Light alloy rims and 26x2. 1 inch (diameter x width) tires roll over anything Strong riser handlebar with colored end plugs completes the sweet MTB look