T-Maxx 1/T-Maxx 3.3 Aftermarket Hardened Ring Gear STMX1201 by GPM  [STMX1201]

Aftermarket hardened spur for T-Maxx models

This hardened steel spur gear is an aftermarket replacement compatible with TRAXXAS T-Maxx 1 and T-Maxx 3.3. It operates as the main ring in the drivetrain, delivering torque from the motor pinion to the gearbox and affecting mesh quality and load distribution across the gear train.

Offered as 1 pcs, the hardened ring is for hobbyists seeking greater durability than softer ally or nylon options. When fitting, check the spur to pinion mesh, confirm proper axial alignment, inspect pinion teeth condition, and make sure bearings run smoothly to prevent premature wear.

Swapping to a hardened-steel ring will not change final gear ratios on its own, but it can help reliability under sustained or higher torque use; always verify tooth count and mounting pattern before installation.