HPI Savage 21 Titanium Front/Rear Universal Swing Shaft With Washers by GPM TSAV12100  [TSAV12100]

Titanium universal swing shaft for Savage 21

This is a titanium front and rear universal swing shaft set designed for the HPI Savage 21 platform, supplied by GPM as part number TSAV12100. The pair includes the swing shafts and matching washers intended to replace stock steel components where hobbyists prefer lighter, more wear-resistant parts on RC-scale drivetrains.

In practice these shafts serve the drivetrain by transmitting torque between gearbox output and wheel hubs while allowing the suspension and steering geometry to move. Titanium offers a balance of strength and lower mass compared with standard steel shafts, and the included washers help maintain correct endplay and alignment during installation.

Installation notes: remove the stock swing shafts following your Savage 21 service routine, transfer any required retainers or bearings, fit the GPM shafts into front and rear assemblies, and use the washers to set axial clearance before final tightening. Verify spline engagement and rotate the drivetrain by hand to confirm smooth movement and correct fitment.

Performance and tuning role: these shafts are a component-level upgrade for durability and reduced rotating mass in the transmission path; they are most relevant when rebuilding after wear or when tuning drivetrain responsiveness and balance for off-road or short-course running.

This GPM titanium set is a direct-fit replacement for Savage 21 owners looking to refresh worn drivetrain parts or marginally reduce rotating mass while keeping a neutral tuning approach; follow standard Savage 21 service steps for fitment and clearance checks.