This 48pitch 40-tooth spur gear is offered as an aftermarket replacement for the O-AP0001 platform. It meshes with the motor pinion to establish gear ratio and set reliable tooth engagement in the drivetrain.
Fit this 40T spur when you need a direct swap for the original large gear or when changing overall gearing for setup work. During installation focus on correct axial placement and pinion mesh, ensure the gear runs true on its bearings, and confirm there is no contact with the gearbox housing.
As part of setup, check pinion-to-spur engagement at low throttle, inspect bearings and backlash, and verify smooth rotation through the vehicle's steering and suspension travel. Changing spur tooth count alters final drive, so pair the 40T with an appropriate pinion to tune acceleration versus top speed.
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