HPI Savage 21 39T Delrin secondary gear DSAV1639T2T by GPM  [DSAV1639T2T]

39T Delrin secondary gear for Savage 21

This Delrin second gear is produced for the HPI Savage 21 platform and carries the part number DSAV1639T2T. The engineered Delrin construction provides low sliding friction and consistent meshing behavior to support repeatable shifting under typical field use.

The item is supplied as a 1 pcs set and includes the mounting screws stated in the original product name. It is intended for direct replacement in compatible Savage 21 two-speed gear sets where the 39-tooth second gear is required.

Assembly recommendations:

• Verify axial position and tooth contact pattern before final assembly to prevent binding and uneven wear.
• Inspect mating spur and pinion geometry and surface condition; renew worn components to protect system life.
• Hand-thread fasteners first, then tighten progressively to achieve uniform clamp without distortion.

Operational notes:

• Use this Delrin second gear to retain predictable shift engagement in stock or lightly modified drivetrains.
• Delrin improves sliding contact characteristics but does not alter gear ratios; select different tooth counts for ratio changes.