parameter: Inner diameter: 3MM Usage: 1, can lock 360-degree steering gear of the steering gear. 2, can be equipped with TT motor that slowdown box! Item specifics: Torque: 800gf cm min(3V) Usage: Electric Bicycle Model number: 410 rubber wheel Output power: STANDARD Continuous current(a): STANDARD Protect feature: Drip-proof Commutation: Brushless Construction: Permanent Magnet Efficiency: IE 1 Type: Gear Motor Certification: CCC Origin: Mainland China Speed(rpm): STANDARD