Features1Aluminum Alloy Material: The electric bike motor set is made of durable aluminum alloy, sturdy and not easily damaged, and can be used for a long time. 2Heat Resisting: The body material and all copper coils of this brush DC motor set provide heat resistance and can be naturally air cooled. 3Low Noise: The electric bike motor controller group has low noise during operation and will not disturb others or oneself, providing you with a better riding experience. 4Complete Equipment: This electric bike motor modification kit includes a 12V250W reduction motor, a 22 tooth sprocket , and a 114 link chain. 5Applicable to This motor conversion kit is applicable to electric bikes, electric tricycles and electric motorcycle, with a wide range of applications.SpecificationItem Type: Electric motorMaterial: Aluminum alloy, metal, rubberWeight: 3231.00g/113.97ozRated Voltage: 12VRated Speed: 2950 rpmReduction Ratio: 8.9Output Power: 250WPackage List1 xGear Reduction Electric Motor1 x Sprocket1 x Chain