TT02 31mm Precision Alloy Dog Bone TT2131 by GPM  [TT2131]

TT02 front and rear dog bone

This 31mm alloy dog bone is an aftermarket drivetrain part produced by GPM for use on the Tamiya TT02 chassis. Designed as a direct-fit replacement for the front and rear half-shafts, it serves as a simple, low-cost upgrade to the stock plastic pieces where users want increased durability and more consistent drivetrain behaviour under load.

As an RC-scale accessory, the part focuses on the drivetrain link between differential outputs and the wheel hubs. The 31mm alloy construction reduces wear compared with typical plastic dog bones and can help maintain power transfer under repeated use. It is intended for 1/10 scale TT02 touring-type setups and should be treated as a component in overall tuning, not a standalone performance solution.

Installation is straightforward: remove the wheel and hub carrier components as required on the TT02, extract the original dog bone, and fit the alloy replacement while checking fitment at the differential cup and hub. A quick check of pinion/spur alignment and diff preload after installation is recommended to ensure smooth operation with the new metal shafts. Use light grease where metal contacts plastic or bearings to reduce wear and noise.

Tuning note: swapping to alloy dog bones can change the feel of the drivetrain under acceleration and cornering by increasing rigidity and reducing flex. Use this part when you need a more repeatable connection for setups that rely on stable power delivery, such as iterative changes to differential settings or suspension tuning.