TAMIYA TT02/TT02B Delrin 42-Pitch 71T Spur Gear DTT2B071T by GPM  [DTT2B071T]

Delrin 42-pitch spur for TT02 builds

This 71-tooth, 42-pitch Delrin spur gear is an aftermarket replacement manufactured by GPM for TAMIYA TT02 series chassis. It is offered as a quieter, lower-friction option to replace the stock spur in TT02 and TT02B gearboxes while keeping correct tooth count for standard gear ratios.

Material and role: Delrin delivers a balance of wear resistance and low sliding friction commonly used on RC drivetrain parts. In a TT02 setup this 71T spur transfers rotation from the motor pinion into the gearbox, directly influencing final drive ratio and how the mesh is set up.

Installation notes: verify a correct 42-pitch mesh with your chosen pinion, set backlash with standard shims or spacing procedures, and confirm axial alignment in the gearbox to prevent binding. After initial fitting, run a short low-load break-in and recheck mesh since plastic spurs can seat slightly under load. The item ships as 1pc for single-gear replacement.

Tuning considerations: a Delrin spur can lower drivetrain noise and give smoother engagement versus harder plastics, which helps for everyday setup and minor gearing changes. Use minimal lubrication and pair with compatible pinions and bearings to maintain smooth operation.