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