HPI Savage 21 Titanium Dogbone Main Shaft TSAV1037D by GPM  [TSAV1037D]

Main-shaft titanium dogbone for Savage 21

This aftermarket dogbone fits the HPI Savage 21 and serves as the main-shaft link between gearbox and wheel hub. Crafted from titanium alloy, it offers improved stiffness and corrosion resistance over standard steel or plated parts. One pair is supplied for direct replacement when shaft interfaces and lengths match.

Installation notes: verify whether your Savage 21 uses the S (76.6mm) or L (83mm) length before installation, measure the installed centre-to-centre distance on the main shaft, and check cups and cross-pins for wear. Use the correct retaining hardware and take care with hex screw torque to avoid binding; confirm free rotation throughout suspension travel after assembly.

Tuning role: using titanium dogbones reduces drivetrain flex and helps resist surface wear under heavy off-road stresses, contributing to steadier power transfer. This component is aimed at improving durability and drivetrain feel rather than providing a standalone speed increase.

Use the GPM TSAV1037D when replacing worn driveline links or when a titanium option is preferred for longer service life; always confirm length and fit before tightening hardware.