The Mountain Bike's 27.5 in. modern design aluminum frame maximizes bump absorption, making it the perfect bike for a smooth ride on mountain roads, forest trails and highways. Mountain bikes have simple and sophisticated mechanical disc brakes for more precise and controlled braking. Mechanical disc brakes are more effective than rim brakes and help make riding safer at high speeds, downhill and in slippery conditions. Equipped with a Shimano TZ500 shifter, classic 21-speed, front derailleur and rear derailleur for responsive shifting so you can quickly select the right gear for every terrain. Enjoy riding experience at different speeds. Mountain bike tires are made of high-quality rubber material with strong puncture and abrasion resistance, bicycle tires are suitable for riding in mountains, jungles or city streets. Free pedals, assembly and debugging tools are included in the package. 85% of the parts are pre-assembled. The assembly video will help you get your bike set up quickly. Color: Grays. Gender: male. Age Group: adult.