This is an RC-scale rear upper suspension shaft designed for the MUGEN MRX-5 chassis, manufactured by Arrowmax and sold under model AM-MRX5-J0105U. The shafts are made from spring steel and finished with a titanium nitride coating to reduce surface friction and improve wear resistance over stock parts.
Functionally, these shafts serve as pivot and load points within the rear suspension assembly, helping to maintain suspension geometry and reduce play at mounting points. The titanium nitride finish lowers friction against bushings and bearings, which can produce smoother suspension action and more consistent handling during setup and track use.
Installation is straightforward for users familiar with RC maintenance: remove the original rear upper shafts, check mating bushings and bearings for wear, then replace with the Arrowmax shafts. Basic hand tools are sufficient for removal and refit, and rechecking alignment and fastener torque after a few runs is recommended to confirm proper seating.
Pack contains 2 pcs of rear upper suspension shafts supplied as a matched set for the left and right sides of the MRX-5 rear suspension assembly.
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