Savage 21 Precision Delrin Clutch Shoes with Springs & Shim DSAV1215X by GPM  [DSAV1215X]

HPI Savage 21 Delrin Clutch Shoe With Springs & Shim (Special Design) - 1pr set - GPM DSAV1215X
Price:
USD$6.40
Brand:
GPM
Model:
DSAV1215X
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Technical overview

The DSAV1215X Delrin clutch shoe kit is an aftermarket replacement intended for HPI Savage 21 clutch carriers and is supplied as a 1pr set. The package combines a stable Delrin friction face with matched springs and a precision shim to permit fine adjustment of engagement depth without altering motor or gearbox alignment.

Use this kit when original shoes exhibit glazing or inconsistent engagement, or as part of a measured clutch tuning program to refine acceleration characteristics. The Delrin compound provides consistent friction performance, while the shim and spring set allow repeatable, incremental changes to engagement timing.

Installation is a direct replacement into the Savage 21 clutch carrier using the existing pins and mounts. After assembly, verify alignment, spring travel, and free movement of the shoes, then perform controlled bench tests to confirm the selected spring and shim combination meet performance expectations. Intended for RC-scale applications only.

What is the primary benefit of the Delrin compound?

Delrin offers dimensional stability and reduced glazing compared with softer materials, helping maintain a consistent engagement surface across repeated cycles.

How should I approach spring rate selection?

Start with the factory springs supplied, then incrementally increase stiffness to reduce slip at launch while monitoring wear and heat; document each change for repeatable setup data.

What checks are recommended after fitting?

Confirm shoe alignment, unobstructed spring travel, and correct shim clearance, then perform bench engagement checks before track use to validate chosen settings.