This 48pitch 40-tooth spur is offered as an aftermarket replacement suitable for the O-AP0001 platform. It engages with the motor pinion to establish the drivetrain ratio and control mesh behaviour.
Use the 40T spur when performing a direct swap of the original large gear or while experimenting with alternative gearing during setup. Installation requires correct axial positioning and careful pinion mesh adjustment, ensuring the gear runs true on its bearings and clears the gearbox housing.
When setting up, verify pinion-to-spur engagement at low throttle, check bearings and any backlash, and confirm smooth rotation through the full range of steering and suspension travel. Altering spur tooth count changes final drive, so pair the 40T with the right pinion to achieve the balance you want between acceleration and top speed.
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