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. It has simple yet sophisticated mechanical disc brakes that allow for more precise and controlled braking. Mechanical disc brakes are more effective than rim brakes, helping to keep you safer when riding at high speeds, down slopes and in wet and slippery conditions. With an Shimano TZ500 shifer, Classic 21-speeds, front derallieurans rear deralieur make the gearshift sensitive, so you can quickly select a gear for every terrain. Enjoy different speed cycling experience. In addtion, Mountain Bike tire made of high-quality rubber material and has strong puncture resistance and abrasion resistance, bicycle tire is suitable for riding in the mountain, jungle or on the city street. Color: Blues. Gender: male. Age Group: adult.