HPI Savage 21 Universal Titanium Front and Rear Swing Shafts TSAV12100 by GPM  [TSAV12100]

Lightweight titanium swing shafts for Savage 21 drivetrains

This is a titanium front and rear universal swing shaft pair intended for the HPI Savage 21 platform, supplied as part number GPM TSAV12100. The set includes both shafts and matching washers to replace heavier steel originals where builders want improved wear resistance and reduced rotating mass in the scale drivetrain.

These shafts transmit torque from the gearbox outputs to the wheel hubs while still allowing suspension articulation and steering movement. Titanium provides a favourable strength to weight ratio compared with standard steel, and the included washers let you set correct axial clearance during installation.

Installation notes: remove the stock swing shafts following your Savage 21 service steps, transfer any retainers or bearings needed, fit the GPM shafts into the front and rear assemblies, and use the washers to adjust endplay before final tightening. Check spline engagement and rotate the driveline by hand to confirm smooth operation and correct fit.

Use case: this pair is a simple component upgrade for owners rebuilding worn parts or trimming rotating mass to slightly sharpen drivetrain response for off-road or short-course running.

This GPM titanium shaft set is a direct-fit replacement for Savage 21 owners who want to refresh worn drivetrain components or shave a small amount of rotating mass; follow standard Savage 21 service procedures for fit and clearance checks.