Outer diameter of large wheel - 73 mm
Opening for the shaft of the large wheel - 15 mm
Height of the wheel measured at the shaft hole - 16/22 mm
Number of teeth of the large wheel - 44
Outer diameter of small wheel - 22 mm
Hole on the rotor shaft of the small wheel - 10 mm
Height of the entire support of the small wheel - 17 mm
Number of teeth of the small wheel - 12