Tamiya TT02/TT02B Ring Gear Steel Upgrade - TT2100/G1 by GPM  [TT2100/G1]

Durable steel ring for TT02 gearboxes

This steel ring gear is an aftermarket direct-fit for Tamiya TT02 and TT02B models, supplied as 1 pcs for use as a replacement or an upgrade to the model drivetrain. The hardened steel design is intended to reduce wear compared with standard plastic rings while retaining the original mounting pattern.

Fitment aims to keep the stock gear mesh and centreline, so installation normally involves basic gearbox access and a careful pinion-to-spur check. Use common setup checks: adjust pinion engagement, ensure free rotation, and re-check mesh after an initial run-in period.

On tuning choices: fitting steel helps when you run stronger motors or non-stock gear ratios where plastic may wear quickly, but expect a change in load transfer that can affect pinion and bearing life. Review your motor and bearing condition before extended high-load operation.