ALL-TERRAIN TIRES - This mountain bike is made of high-quality rubber, the all-terrain tires are extremely puncture-resistant, soften bumpy roads, cling to dirt, trails, gravel, and paved surfaces for a smooth and smooth ride, strong grip with superb anti-skid function, not easy to slip. 21 DUAL DISC BRAKE SYSTEM - This 24-inch mountain bike features thumb shifters, and the 26-inch mountain bike features U-brake grip shifters to help smooth shifting, and the 21-speed shifting system makes it easy to switch speeds depending on the terrain and your preference for a smooth, efficient ride. 24/26 INCH WHEELS - This mountain bike is perfect for commuting, recreational riding and off-road adventures. They provide better stability, control and comfort than smaller wheels. SHOCK-ABSORBING FORK DESIGN - This mountain bike features a 100mm front suspension fork, which is thickened to help resist and absorb shocks. Lightweight, strong and durable, it is perfect for riding on rough terrain. It also provides better shock absorption, reducing vibration and improving overall ride quality. EASY TO ASSEMBLE - The bike comes 85% pre-assembled. You will need to assemble the handlebars, saddle, front wheel and pedals. After a short adjustment to the brakes and gears, you can start riding immediately.