These motors are mounted directly to our large robot tires

This is a powerfull motor  fitted with a 75:1 metal gearbox. The gears are all steel and the output shaft is 4mm diameter. The DC motor has extra rear shaft for mounting encoder on the high speed side (before gearbox) in case you want better control over rpm.

Voltage = 6V (7.5V max)

No load current = 250mA

Sall Current = 3.3 A 

Stall Torque = 3.2 Kg/cm

Motor Rated RPM = 133

Shaft Diameter = 4 mm

Motor Length (without shaft) = 52 mm

Motor Diameter = 25 mm