The whole vehicle is made of precision steel pipes, with solid and non shaking materials, providing you with safer riding protection. The flywheel is wrapped on both sides to avoid scratches or clothing getting stuck by belts and gears, greatly improving riding safety. The circular magnetic resistance+emergency braking of cowhide, permanent magnet maintenance free elimination of abnormal noise, quiet and smooth. The heavier the flywheel, the more stable the ride, and the smoother the high-speed operation. The non jamming will not cause inertial impact on the knees, comprehensively improving the riding experience. The scientific triangular frame, combined with a H-shaped base, has a strong and compressive golden mechanical structure, firmly grasping the ground and not shaking