TRAXXAS TRX4 12T Steel Pinion Upgrade - TRX4012T by GPM  [TRX4012T]

12-tooth steel pinion tailored for TRX4

This aftermarket pinion is made to fit the TRAXXAS TRX4 Trail Crawler platform and comes as a twin pack. Constructed from hardened #45 steel, it is intended for crawlers that need a tougher pinion for tighter mesh and repeatable low-speed control.

The gear mounts to the motor with the supplied 3x3 screw shaft and delivers torque to the drivetrain. Reference dimensions from the source include a center hole of 3.175mm, tooth count 12T, pitch number 32, and tooth spacing 0.8mm; use these to confirm compatibility with your motor shaft and spur gear prior to installation.

Fitment advice: ensure a 3.175mm motor shaft and a matching 0.8mm pitch spur, slide the pinion onto the shaft, tighten the supplied screw shaft, and check gear mesh and endplay on the bench before trail use to avoid early wear. This description focuses on compatibility and setup for RC-scale models.