Hiland 26 27.5 29 Inch Mountain Bike, Mens Womens MTB with 21 Speeds, High-Tensile Steel Frame, V Brake, Hardtail Bicycle for Adults 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’’, 29″ mtb fits riders over 5’9’’; 90% pre-assembly and the tools provided