Features:1. Double-kill disc brake system, more stable and reliable2. Thickened shock-absorbing front fork3. High carbon steel material, strong and reliable4. Simple and stylish appearanceSpecifications:1. Product Size: 26 Inches2. Cushion Height Adjustment Height Range: 800~970mm3. Gear Shift: 21-Speed (Front 3, Rear 7)4. Frame: High Carbon Steel5. Front Fork: Shock-Absorbing Front Fork6. Handlebars: Mountain Bike Handlebars High Carbon Steel Sand Black 620mm7. Stem: Aluminum Alloy Stem8. Front And Rear Brakes: Mechanical Disc Brake Aluminum Alloy9. Roulette: High Carbon Steel 24T*34*42T10. Shift Lever: Shimano Tx30 Shift Lever11. Front And Rear Derailleurs: Shimano Tz500 Front And Rear Reflectors12. Front And Rear Hubs: Iron Hub 36H13. Flywheel: High Carbon Steel Domestic Flywheel14. Chain: Tec Chain15. Pedals: Plastic Pedals16. Saddle: Mountain Bike Saddle Puv Pu Pp17. Saddle Tube: High Carbon Steel 28.6*300mm18. Quick Release: Aluminum Alloy Quick Release19. Car Ladder: High Carbon Steel Car Ladder20. Tires: Kirin Tires21. Front And Rear Reflectors: Front White And Back Red22. Wheel Light Sheet: White23. Weight: 18kgPackage Includes:1 x Mountain Bike ��PROFESSIONAL 21-SPEED SHIFTING SYSTEM�� ��COMFORTABLE RIDING EXPERIENCE�� ��EASY TO INSTALLMENT�� ��DURABILITY ADJUSTABILITY�� ��DETAIL DESIGN��