Description Transmission is accurate no slip at work with a constant transmission ratio Smooth transmission with a buffer shock absorption capacity low noise Easy maintenance no lubrication low maintenance costs Specification Name Skateboard componentModel 509771Color BlackMaterial Surface oxidationGear of Wheel 48Gear of Motor 16Bore of Wheel 22mmBore of Motor 8mmBelt Width 10mmBelt Length 225mmScrew of Wheel 6Screw of Motor 3Package Included 1 X Pulley For Wheel1 X Pulley For Motor1 X Belt9 X Screws