HPI Savage 21 39T Delrin 2-speed second gear by GPM DSAV1639T2T  [DSAV1639T2T]

Second gear for Savage 21 (39T)

This is an RC-scale replacement second gear designed for the HPI Savage 21 platform, supplied by GPM as DSAV1639T2T. The gear is molded in Delrin to provide low friction engagement in the gearbox and aims to offer predictable shift feel under typical off-road and bash conditions.

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.

Installation notes:

• Verify existing gear mesh and clearance before final assembly to prevent binding.
• Inspect mating spur and pinion for wear; replace worn components to preserve gear life.
• Hand-tighten screws first, then torque progressively to ensure even seating without over-tensioning.

Tuning role:

• Use this Delrin second gear to maintain consistent shifting characteristics when running stock or lightly modified drivetrains.
• Because Delrin reduces friction, it can help smooth transitions between gears, but it does not change gear ratios; ratio changes require different tooth counts.