?STURDY FRAME?Built with a durable carbon steel frame, matte finish, and internal buried brake cables, this all-terrain mountain bike delivers enhanced durability, improved ride safety, and a clean modern look. ?Great Braking System?Disc brakes allow for more precise and controlled braking, are more effective than rim brakes, and help keep riders safer when riding at high speeds, down slopes, and in wet conditions. ?Shimano 7-Speed Gear System?This bike is equipped with a Shimano 7-speed drivetrain, offering smooth shifting and versatile performance for various terrains. ?Thick Shock-Absorbing Front Fork?This bike features a reinforced shock-absorbing front fork, providing a smoother and more comfortable ride on various terrains ?Assembly & Size Guide?85% pre-assembled, tools included. If you have any questions about bikes, please do not hesitate to contact us. The 20-inch bike fits 45?-55? tall kids for ages 6-12.