[AUTOMATIC REBOUND OF REAR DRIVE] When the abdomen wheel is pushed to a firm state, there will be a rebound function to help reset easily.
[SILENT DOUBLE BEARING] 4 wheels are under force. The double bearing of each wheel adopts silent bearing, smooth rolling, no noise, stable and comfortable, and will not hurt the floor during exercise.
[STRONG GRIP] Imitate the texture of car tires, with good anti-skid effect, strong grip, and no skidding.