Tamiya TT02 31mm Alloy Dogbone Front and Rear TT2131 by GPM  [TT2131]

31mm alloy dog bone for TT02 front and rear shafts

This alloy dog bone is an aftermarket drivetrain component produced by GPM for the Tamiya TT02 chassis. It replaces the factory plastic front and rear half-shafts with a 31mm metal unit to offer increased wear resistance and steadier torque transmission under typical 1/10 scale touring use.

The part connects the differential output cups to the hub carriers and helps reduce the gradual wear seen on stock plastic dog bones, aiding consistent power delivery across multiple runs. It should be considered as part of broader setup changes rather than a standalone performance upgrade.

Installation is simple: remove wheel and hub carrier assemblies as required, pull out the original dog bone and fit the alloy replacement, checking engagement at the diff cup and hub. After fitting, confirm gear mesh and diff preload, and apply light grease where metal interfaces with plastic or bearings to reduce wear and noise.

Setup note: alloy dog bones can alter the drivetrain feel by reducing compliance and increasing rigidity. Use TT2131 when you need a more repeatable coupling for tuning diffs or suspension tweaks.