[Robust Frame For Adults: The high carbon steel frame ensures durability for adult mountain bikes featuring a reinforced front suspension fork for optimal bump absorption providing absolute control Versatile 21-Speed Drivetain: Equipped with a 21-speed drivetrain adult bikes offer a variety of speed options for a flexible riding experience. Easily adjust the gears to suit your preference Smooth City Commutes: This adult mountain bike is your reliable companion ideal for relaxed city commutes and enjoyable rides on easy trails. It transitions seamlessly between city streets and scenic trails Dependable V-Brake System: Traditional v-brakes deliver reliable stopping power making them easy to maintain and adjust ideal for beginners learning the fundamentals of brake control in outdoor environments Choose Ideal Size: Tailored for both men and women the 26" adult mountain bike fits riders between 5’4’’-5’9’’ while the 27.5" bike fits riders between 5’8’’-6’5’’. 90% pre-assembly and the tools provided]