Features [Aluminum Frame]: The mountain bike equiped with Aluminum Frame. Lighter but stronger frame. [21 Speed Shimano Drivetrain]: Use Shimano handle for smooth speed change. Ensure smooth shifting during the ride. [Great Tire Performacce]: Ultra durable, the mountain bike tire made of high-quality rubber material and has strong puncture resistance and abrasion resistance, bicycle tire is suitable for riding in the mountain, jungle or on the city street. [Powerful Dual Disc Brake]: Our mountain bikes have precision mechanical disc brakes for more precise and controlled braking. Mechanical disc brakes are more effective than V brakes. [Quick Installation in 20 Minutes]: The Elecony bike arrives 85% assembled and includes free pedals and assembly tools. It is easy enough to put together in 20 minutes. The bike can be fully assembled with ease with the help of tutorial videos, and we are more than happy to help with any problems you may have during the assembly process. Product Information Bike Type: Mountain Bike Age Range (Description) : Adult Number of Speed:  21-Speed Color:  Orange/Black/Green/Red Wheel Size: 24 Inch Frame Material: Aluminium Suspension Type: NO Use case: Garden & Outdoor Sport or Fitness Features: Anti-slip Installation Steps Please open the box to check if the accessories are complete. Including:overall frame front wheel,handlebar,saddle,a pair of foot pedals,front and rear reflectors,tool kit,bicycle manual. Adjust the Direction of the Stem and Front Fork Handlebar Assembly Saddle Assembly Front Wheel Assembly Pedals Assembly For detailed installation steps, please refer to the installation manual included in the package.