Tamiya TT02 31mm Alloy Dog Bone Front and Rear - TT2131 by GPM  [TT2131]

TT02 front/rear 31mm dog bone upgrade

This 31mm alloy dog bone is an aftermarket drivetrain component produced by GPM for use on the Tamiya TT02 chassis. It is supplied as a direct-fit replacement for the front and rear half-shafts and is intended as a cost-effective metal alternative to the stock plastic dog bones for hobbyists wanting greater durability and steadier drivetrain behaviour under load.

Functioning as the connection between the differential outputs and the wheel hubs, the alloy construction helps reduce wear compared with standard plastic dog bones and keeps power transfer more consistent during repeated running. The part is sized for 1/10 scale TT02 touring setups and should be considered part of a broader tuning approach rather than a single performance cure.

Installation is straightforward: remove the wheel and hub carrier as needed on the TT02, remove the original dog bone, and install the 31mm alloy replacement, checking fit at the diff cup and hub. After fitting, verify pinion and spur alignment and diff preload to avoid binding, and apply a light film of grease where metal contacts plastic or bearings to limit noise and abrasion.

Tuning note: moving to alloy dog bones will stiffen the drivetrain link and can alter the vehicle feel during acceleration and cornering. Use TT2131 when you need a more repeatable connection for incremental changes to diffs or suspension settings.