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                 The first release is a transmission unit consisting of 2 powerful gear head motors and 2 highgrip sponge tires. One unit (1 tire & motor) can support approximately 2kg, with total supporting weight of approximately 4kg. 380K75 motor running from a DC7.2V power source has rotational speed of 242 rpm (unloaded) and max torque of 5.0 kg/cm. Running speed is 1m per 0.74 seconds (with 4kg load). Total weight of set is 480g. Check with our hardware parts and ball caster. 
                Gearhead Motor Specifications:
                Voltage: 7.2V
                RMP with no load: 242 RPM 
                Current consumption at no load: 0.67A 
                Torque at best efficiency: 5kgf.cm 
                Motor Weight: 180g
                Content of the Package:
                Gearhead motor x 2
                64mm Sponge Tire (64mm diameter with 40mm width) x 2 
                Motor Mount x 2 
                Wheel Hub x 2 
                3x10mm Screw x 9 
                3x15mm Screw x 9 
 
                3mm Flanged Nut x 9
                
                3x4mm Grub Screw x 3 
                3mm Spring Washer x 7
                
 
                3x6mm Screw x 7
                
                4mm Flanged Lock Nut x 2 
                Box Wrench (Tool) x 1 
                Hex Wrench (Tool) x 1 
 
                Double sided tape x 4
                Click for detailed specifications.