Specifications:1. Product Size: 29 Inches2. Seat Cushion Height Adjustment Height Range: 890 ~ 1020mm3. Gear Position: 21 Speeds4. Frame: High Carbon Steel5. Front Fork: Iron Shoulder And Iron Leg Shock-Absorbing Front Fork6. Rim: Aluminum Alloy Double-Layer Rim7. Handlebar: Mountain Handlebar, Highcarbon Steel, Sand Black, 620mm8. Stem: Aluminum Alloy Stem9. Front And Rear Brakes: Mechanical Disc Brake Aluminum Alloy10. Wheel: High Carbon Steel Wheel 24T*34*42T11. Chain: Guimeng Chain12. Pedal: PVC Pedal13. Saddle: Mountain Bike Saddle PUV PU PP14. Saddle Tube: High Carbon Steel 28.6*300mm15. Quick Release: Aluminum Alloy Quick Release16. Car Ladder: High Carbon Steel Car Ladder17. Tires: 29*2.125 Kirin Tires18. Front And Rear Reflectors: Front White And Rear Red19. Luminous Film: White20. Weight: 39.37Lbs / 17.86Kgnbsp;Package Includes:1 x Mountain Bike ��DURABLE HIGH-CARBON STEEL FRAME�� Constructed from a robust high-carbon steel frame, this 29-inch mountain bike offers exceptional durability and a smooth, stable cycling experience. Ergonomically designed, it accommodates riders from 5’4″ to 6’4″, ensuring comfort and safety for all users. ��21-SPEED GEAR SYSTEM WITH MECHANICAL DISC BRAKES�� Equipped with a 21-speed gear system, the trigger shifter allows smooth and easy gear transitions for tackling various terrains. The mechanical dual disc brake system provides reliable stopping power in all weather conditions, offering excellent control and easy maintenance. ��SHOCK-ABSORBING FRONT FORK AND SUSPENSION�� The mountain bike for adults features a shock-absorbing front fork that smooths out bumps and vibrations. The shock absorbers ensure a comfortable ride over rugged terrain, making it ideal for mountain trails and off-road adventures. ��29�� ALL-TERRAIN TIRES�� The 29*2.125″ tires are designed to handle multiple terrains, offering superior grip, anti-skid performance, and enhanced puncture resistance. Whether you’re riding on dirt paths, gravel roads, or paved trails, these tires ensure a stable and smooth ride. ��85% PRE-ASSEMBLED FOR EASY SETUP�� This mens mountain bike arrives 85% pre-assembled, so you’ll only need to install the handlebar, pedals, front wheel, and saddle. After a quick adjustment of the brakes and gears, you’re ready to hit the road or trail immediately. For any questions, our customer service is here to help.