MUGEN MRX-5 Rear Upright 7075-T6 - Arrowmax AM-MRX5-H2124 Upgrade  [AM-MRX5-H2124]

Overview of rear upright function

This Arrowmax rear upright is an RC-scale replacement made from 7075-T6 aluminium for use on MUGEN MRX-5 cars. The uprights are supplied with two sets of composite ring inserts that interface with the pivot ball to sharpen suspension sensitivity and support smoother articulation during both compression and rebound phases.

Replacing stock plastic uprights with these aluminium units alters chassis behaviour: the stiffer material produces crisper suspension response and a modest tendency to push on throttle at corner exit compared with softer parts. That predictable change should be considered when adjusting toe, anti-roll settings, or shock valving to regain rear traction.

Installation follows normal wheel hub disassembly and pivot ball retention procedures and needs no extra machining for MRX-5 compatibility. When setting up, use the supplied composite rings to fine-tune pivot compliance before changing major suspension settings.

For MRX-5 drivers seeking a robust metal upright and improved pivot-ball feedback, the Arrowmax AM-MRX5-H2124 offers consistent suspension behaviour and a manageable effect on rear traction under power.