2302 Series Aluminum, MOD 0.8, Hub Mount Gear (32mm Bore, 90 Tooth)

The 90 tooth, MOD 0.8 gear will mate with any MOD 0.8 gear, but when building on pattern, the most common partner for this gear is a 30 tooth pinion gear or servo gear.  Using the pinion gear you can create 3:1 underdrive or overdrive setup depending on your application.  When used with the 30 tooth servo gear, the combo creates a 3:1 underdrive, slowing the final speed while increasing the torque by 3x.