Titan #135 Glacier PRO Alloy Dual Suspension All Terrain 21-Speed 19-Inch Frame Mountain Bike Dual Suspension Men's Mountain Bike with Combined Alloy and Steel Frame for Ruggedness and Weight Savings Front and Rear Suspension Shocks with Front JAK Super brake Disc Braking System 21-Speed Gearing with SHIMANO Revoshift Grip Shift System with Comfortable Hand Grips SHIMANO Tourney TX Rear Gear Changing Derailleur and DNP Front Derailleur For Smooth Gear Shifting Alloy Handlebar Stem, Alloy Handlebar, Alloy Seat Post with Quick release, Frame Triangle Full Alloy, and Alloy Crank Arms, Chrome Plated Crank