Item Type: Mecanum Wheel_x000D_Material: ABS, rubber, copper_x000D_Purpose: DIY smart car, small robot_x000D_Wheel Parameters:_x000D_Diameter: Approx. 48mm / 1.9in_x000D_Coupling Type: For TT coupling_x000D_Motor Parameters: _x000D_Working Voltage: 3V12V DC (recommended working voltage is around 6 to 8V)_x000D_Torsion: 0.8kg/cm (at 3V)_x000D_Reduction Ratio: 1: 48_x000D_Load Current: 70mA (250mA maximum)(at 3V)_x000D_VoltageNo-load currentNo-load speed_x000D_6V200mA20010% rpm_x000D_3V150mA 9010% rpm 1For TT motor has no welding plug, users do it by themselves, versatile and convenient 2The outside of the wheel is an artificial shape, the color use yellow and black, and the appearance is more three?dimensional 3The rubber?coated wheel is made of rubber material, which bring smooth running and better gripping ability 4Allow the four?wheel drive smart car to realize left and right translation, large?angle drift, tilt 45 direction movement, square track movement and other movement modes, very practical 5For TT motor adopt all environmentally friendly materials, equipped with good?quality carbon brushes, strong magnetic core, with shielding ring 1 x Left Wheel 1 x Right Wheel 2 x Motor