Titan Fusion Pro 21-Speed Mountain Bike, Alloy-Frame, Full Suspension, All-Terrain with Front Disc Brake, Assorted Colors 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