MUGEN MRX5 Front Lower Arm Shaft (Spring steel) by Arrowmax AM-MRX5-H2105  [AM-MRX5-H2105]

Front lower arm shaft for MRX5

This Arrowmax replacement part is an RC-scale front lower arm shaft designed for the MUGEN MRX5 chassis. The shaft is made from spring steel and features a titanium nitride surface treatment to lower friction at pivot points and resist wear under repeated use. It ships as 2 pcs for one side or paired replacements depending on your setup.

Functionally, this shaft is a direct-fit wearable item that influences suspension smoothness and consistency. In tuning, a lower-friction pivot can help the suspension return to neutral more predictably and keep handling consistent lap-to-lap. The coated surface helps reduce binding where the shaft contacts plastic or alloy arms and retaining hardware.

Installation notes: confirm alignment with your MRX5 lower arm and check mating holes for excessive play. Replace as a matched pair if wear or scoring is visible, and verify that retaining clips or screws are correctly seated. Use light, RC-appropriate lubrication sparingly on contact surfaces if desired; avoid heavy greases that attract debris.