When you walk into the gym, the big tires stuck there will definitely not escape your sharp gaze. This is a gym, not a place to repair cars. Why do we need so many tires?As everyone knows, using tires for fitness has become the mainstream in the fitness industry. There are many benefits of tire fitness, including improving cardiopulmonary aerobic and anaerobic muscle strength, and conducting full-body training. If you are tired of using the equipment in the gym, come and try training with big tires.