HPI Savage 21 Main Shaft Titanium Dog Bone TSAV1037D by GPM  [TSAV1037D]

Stiff titanium dog bone for Savage 21 main shaft

This aftermarket dog bone is made for the HPI Savage 21 platform and links the gearbox to the wheel hubs at the main shaft. Manufactured from titanium alloy, the component increases stiffness and offers better corrosion resistance than standard steel or plated parts. The package contains one pair sized for direct replacement when shaft interface and cup fitment match.

Installation notes: confirm whether your Savage 21 uses the S (76.6mm) or L (83mm) length before fitting, measure the centre-to-centre distance on the main shaft and inspect existing cups and cross-pins for wear. Use the correct retaining hardware and torque hex screws to the recommended feel to avoid binding, and verify free rotation through suspension travel after assembly.

Tuning role: fitting titanium dog bones helps reduce drivetrain flex and limits surface wear in high-stress off-road running, preserving more consistent power transfer under load. This is a chassis durability and drivetrain refinement part rather than a raw speed upgrade.

Choose the GPM TSAV1037D dog bone when replacing worn main-shaft links or when a titanium option is preferred for longevity and reduced wear at the shaft interfaces; always confirm length and fit before final assembly.