GPM TSAV1037DL HPI Savage 21 112mm Titanium Main Shaft Dog Bone  [TSAV1037DL]

112mm titanium main shaft dog bone

This 112mm titanium dog bone is an aftermarket replacement for HPI Savage 21 main shaft setups, supplied as a single piece for RC drivetrain use. It fits the Savage submodels shown in the compatibility box and replaces standard steel or alloy dog bones to give a corrosion resistant connection between the main shaft and outdrives while keeping fitment straightforward.

Installation tips: follow your chassis manual to remove the rear driveline assembly, then slide the dog bone into the outdrive and main cup and secure any retaining pins or clips present on your unit. No machining of the main shaft is required for the listed compatible models. After reassembly check free rotation and correct centring before applying final torque to related fasteners.

Setup notes: this titanium dog bone helps keep drivetrain alignment under load and lowers the chance of bending that can upset gear mesh and power transfer. Replace worn dog bones as part of routine service or when you alter diff or outdrive geometry during tuning.