Tamiya T3-01 Main Spur Gear 39T by Factory Pro FP-O-AP0007  [FP-O-AP0007]

Main spur gear for T3-01

This Factory Pro FP-O-AP0007 Main Spur Gear is specified for compatibility with O-AP0004 and Tamiya T3-01 chassis applications. As a 39T main spur, it plays the standard drivetrain role of transferring rotation from the pinion to the gearbox, affecting final gear ratio and on-track behaviour.

Installation notes: fit the spur onto the gearbox input plate according to your chassis service manual, check pinion-to-spur mesh across the full rotation to avoid tight spots, and ensure set screws are torqued to the gearbox maker's recommendations. After installation, verify free rotation of the drivetrain and remove any debris before testing.

Tuning role: changing spur tooth count shifts the gear ratio when paired with the pinion gear, offering a predictable way to trade top speed for acceleration or vice versa during setup. Use this part when adjusting gear ratios for different track layouts or motor characteristics.