This 2pcs set of 14T steel pinion gears is an aftermarket replacement for TRAXXAS TRX4 trail crawlers, built to mount on the motor shaft and transfer drive to the spur and drivetrain. It is intended for scale crawling setups where stronger, hardened pinions are preferred over softer materials.
Key specifications from the source are retained: hardened steel #45 construction, 14 teeth, 3.175mm center bore to fit common motor shafts, 0.8mm tooth spacing, and pitch 32. The pack includes a single 3x3 screw shaft to lock the pinion to the motor. Always confirm the pinion specs match your spur gear and motor shaft before fitting.
Installation tips: check the motor shaft diameter is 3.175mm, set proper gear mesh with the spur to avoid binding, and tighten the securing screw to prevent slippage while avoiding over-torquing the shaft. Selecting a different tooth count will change the gear ratio, affecting torque and top speed depending on your motor and ESC setup.
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