Non-electric model Features: PROFESSIONAL 21-SPEED SHIFTING SYSTEM: The 21-speed transmission system with quick, precise gear changes makes this mountain bike can easier to adapt to different terrain. Made of non-slip and explosion-proof materials, our tires can easily conquer gravel paths, dirt paths, and rocky roads. POWERFUL SHOCK ABSORBING AND BRAKING: The shock-absorbing cushion is matched with a thickened shock-absorbing front fork that is fitted with a double shock absorption effect. Mechanical dual disc brakes have a strong braking force and can provide a more sensitive braking response than other brakes. COMFORTABLE RIDING EXPERIENCE: Lightweight aluminum alloy wheels are matched with specially designed spokes that can better assist reduce wind resistance during riding. The lock-out suspension fork handles bumps and dips for a smoother-feeling ride. DURABILITY & ADJUSTABILITY: Made of high-carbon steel frame, this adult bikes is strong and will not deform. This mountain bike features a quick-adjust seat post clamp, you make easier adjustments seat to the right height. EASY TO INSTALLMENT: The 26-inch bike arrives with 85% assembled. You only need to assemble the handle, cushion, front wheel and pedal, adjust the brake and gear to complete the assembly. PLEASE CONTACT US BY EMAIL IF YOU ENCOUNTER ANY PROBLEM THAT CANNOT BE RESOLVED. Specification: Bike Type：‎Mountain Bike Age Range (Description)：‎Adult Number of Speeds：‎21 Color：‎Yellow Wheel Size：‎26 Inches Frame Material：Carbon Steel Suspension Type：Dual Special Feature：‎Lightweight, Good Performance, Easy to Assemble, Pretty Design Included Components：Kickstand, Instruction Size：‎26 Inch Brake Style：Disc Specific Uses For Product：Off-road, Mountain biking Theme：‎General Outdoor/Sports Style：‎Functional and Stylish Wheel Material：‎Carbon Steel Seat Material Type：‎PVC, PU, PP Assembly Required：‎Yes Bicycle Gear Shifter Type：‎Trigger Skill Level：‎Intermediate Item Dimensions LxWxH：‎51.9 x 28 x 8.7 inches Suggested Users：‎unisex-adult Hand Orientation：‎Right What You Get: 1 x 26" Mountain Bike