This is a pinion gear with a 4.5:1 gear ratio for the S280 gearbox. It is used with the Great Planes Park Flyers.
Features: Replace worn pinion gear or change your gear ratio
Outer Diameter: 6mm
Hole Diameter: 2mm
Note: The higher number of teeth on a pinion gear results in higher speed of your model. The fewer number of teeth gives more torque.