This front and rear titanium universal swing shaft set is intended for the HPI Savage 21 platform and is supplied under part number GPM TSAV12100. The pair comes with matching washers so you can replace the stock steel shafts and maintain correct axial clearance during assembly.
In service these shafts transfer torque from gearbox outputs to wheel hubs while permitting suspension travel and steering movement. Titanium reduces rotating mass compared with steel while keeping strong spline engagement, and the washers assist with endplay adjustment at installation.
Fitment tips: follow your Savage 21 maintenance routine to remove the original shafts, move across any bearings or retainers required, install the titanium shafts into the front and rear carriers, and use the supplied washers to set clearance before final torque. Manually rotate the drivetrain to check for smooth operation.
Tuning note: this upgrade is aimed at durability and marginal mass reduction in the transmission path, useful when refreshing worn parts or tuning drivetrain feel for off-road running.
The GPM titanium set gives Savage 21 owners a direct-replacement option for worn swing shafts while offering a small reduction in rotating mass; always confirm spline engagement and clearance when installing.
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