HPI Savage 21 Delrin Spur Gear 49T - DSAV1049T by GPM  [DSAV1049T]

Overview and fit

This is a 49-tooth Delrin main spur intended for use in the HPI Savage 21 drivetrain, offered as a direct replacement for compatible gearboxes. The Delrin construction aims to deliver steady geometry and reduced friction compared with generic nylon spurs.

The spur controls contact with the pinion, influences final drive engagement and affects drivetrain smoothness under load. Delrin's dimensional stability helps maintain a consistent mesh and can reduce intermittent binding typical of some stock materials.

Fitment follows standard Savage 21 procedures: open the gearbox, expose the spur/pinion area, ensure bearings are seated correctly, position the spur on the shaft and set backlash properly before reassembling. Inspect the pinion and bearing condition during the swap to prevent early failures.

Packaged as one piece for model upkeep or light performance tuning where owners prefer the consistency of Delrin for aftermarket replacements.