Product Information Bike Type mountian bike Height range description fits height 4'9"-5'4" Frame Material Type Carbon Steel Handlebar Type Flat Handlebar Bike Shift Levers Shifter Lever with Gear Indicator Suspension Type Front Brake Style Disc Speeds 21 speeds Rim Material aluminum alloy Included Components toolkits，Assembly Instructions，reflector Wheel Size 26x2.125 Frame dimensions (seat tube clamp to wheel center axis length) 18inch load-bearing 250lb Tire Type Clincher【High Carbon Steel Frame for Durability】Crafted with a high carbon steel frame, this 26-inch mountain bike ensures exceptional strength and longevity, making it ideal for teens and adults who enjoy outdoor adventures or daily fitness routines.【 21-Speed Smooth Shifting System】 The 21-speed gear system allows for effortless transitions between gears, providing a smooth ride on various terrains, from steep hills to flat roads.【Dual Disc Brakes for Safety】Equipped with dual disc brakes, this sport bicycle offers reliable stopping power and enhanced safety, perfect for men and women riding in diverse weather conditions.【Designed for Teens and Adults】With an ergonomic design, this mountain bike is suitable for both teens and adults, offering a comfortable and enjoyable riding experience for exercise or leisure.【Versatile Exercise Equipment】Whether you're a beginner or an experienced rider, this 26-inch mountain bike is an excellent choice for exercise equipment, promoting fitness and outdoor activity for men and women alike.