About this item Aluminum MTB frame with hydroformed tubing and a powerful front suspension fork is strong and reliable; 26-inch wheels fit riders 64 to 74 inches tall 21-speed shifters make for smooth gear changes on every ride Front and rear V-brakes ensure quick stops out on the trail Light, durable alloy rims and 26x2.125" (diameter x width) tires roll over anything Riser handlebar with colored end plugs completes the MTB look The tools you will need to assemble the bike : Socket wrench., 4, 5, 6, and 8 mm Allen wrenches, 15 mm open-end wrench or adjustable wrench, Wire cutters or scissors, Grease, Phillips and flat blade screwdriver, Box cutter or knife