Dimensions with reducer: outer diameter 14.3mm length 23.5mm. Reduction ratio 1:10: high speed, good linearity, suitable for X02. Reduction ratio 1:30: Moderate speed, large linear torque at low speed, not slow at high speed, suitable for models A01/02/03 five-door Wrangler/P01/P02 metal chassis, and it should be noted that the front of the car needs to be trimmed when used on X01 The pole, the P01 plastic chassis needs to trim the position where the motor is installed. Reduction ratio 1:50: moderate speed, large linear torque at low speed, not slow at high speed, suitable for military card M01/M02. Reduction ratio 1:100: low speed, large torque, suitable for conversion into low-speed vehicles. Motherboard size: 26.514.59.8mm.