Specifications - Product Size: 26 Inches Cushion Height Adjustment Height Range: 780 approximately 990mm Gear Shift: 21-Speed (Front 3, Rear 7) Frame: High Carbon Steel Front Fork: Shock-Absorbing Front Fork Handlebars: Mountain Bike Handlebars High Carbon Steel Sand Black 620mm Stem: Aluminum Alloy Stem Front And Rear Brakes: Mechanical Disc Brake Aluminum Alloy Roulette: High Carbon Steel 24T x 34 x 42T Shift Lever: Race Crown Shift Lever Front And Rear Derailleurs: Race Crown Front And Rear Derailleurs Front And Rear Hubs: Iron Hub 36H Flywheel: High Carbon Steel Domestic Flywheel Chain: Tec Chain Pedals: Plastic Pedals Saddle: Mountain Bike Saddle Puv Pu Pp Saddle Tube: High Carbon Steel 28.6 x 300 mm Quick Release: Aluminum Alloy Quick Release Car Ladder: High Carbon Steel Car Ladder Tires: Kirin Tires Front And Rear Reflectors: Front White And Back Red 2Wheel Light Sheet: White Weight: 16kg Package Includes: 1 x Mountain Bike