MUGEN MRX-5 Rear Upper Shaft (Spring Steel) AM-MRX5-J0105U by Arrowmax  [AM-MRX5-J0105U]

Arrowmax rear upper shaft for MUGEN MRX-5

This part is a dedicated rear upper suspension shaft made for the MUGEN MRX-5 chassis, sold by Arrowmax as model AM-MRX5-J0105U. The shafts are produced from spring steel and receive a titanium nitride coating to minimise surface friction and boost wear resistance compared to original parts.

These components serve as pivot points and load carriers inside the rear suspension, playing a role in keeping geometry true and reducing play at attachment points. The TiN surface helps lower friction at contact points with bushings and bearings, promoting smoother suspension action and more consistent behaviour while tuning and running.

Installation follows typical RC practice: remove the factory rear upper shafts, check the condition of bushings and bearings, then fit the Arrowmax shafts. Basic hand tools are sufficient and it is advisable to verify alignment and fastener torque after a few laps to ensure everything is seated correctly.

The pack includes 2 pcs, provided as a matched left and right set for the MRX-5 rear end.