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

Heavy-duty steel ring for TT02 family

This aftermarket steel ring gear is a direct-fit option made for Tamiya TT02 and TT02B gearboxes, supplied as 1 pcs for replacement or upgrade of the model-scale drivetrain. Its hardened steel body is intended to offer greater wear resistance than the stock plastic ring while keeping the original mounting interface unchanged.

Installation focuses on preserving the stock gear mesh and centreline, so swapping the part usually requires basic gearbox disassembly and a check of pinion-to-spur contact. Follow standard setup steps: verify pinion engagement, confirm free rotation, and re-check mesh after a short break-in run to ensure stable contact.

For tuning: a steel ring gear is useful when using higher-power motors or altered gear ratios where plastic wear becomes an issue, but it will change how loads pass through the drivetrain and can place extra stress on the pinion and bearings. Confirm your motor and bearing condition before extended use.