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

Titanium main shaft dog bone for Savage 21

This aftermarket dog bone is produced for the HPI Savage 21 chassis and links the gearbox output to the wheel hubs at the main shaft. Constructed from titanium alloy, it increases stiffness and offers enhanced corrosion resistance compared with standard steel components. The kit supplies one pair suitable for a direct swap when shaft dimensions and cup fit match.

Installation notes: confirm whether your Savage 21 uses the S (76.6mm) or L (83mm) length prior to fitting, measure the centre-to-centre distance on the main shaft and examine existing cups and cross-pins for wear. Use correct retaining hardware and apply controlled torque to hex screws to prevent binding, then check for free rotational movement through the suspension travel range.

Tuning role: upgrading to titanium dog bones reduces driveline flex and resists surface abrasion under heavy off-road loading, helping to maintain steadier power transfer. This component focuses on chassis-level durability and improved driveline behaviour rather than pure top-speed gains.

Select the GPM TSAV1037D when replacing worn main-shaft links or when you want titanium for longer life and reduced wear at the mating faces; always verify size and alignment before final assembly.