LOSI PROMOTO-MX 1/4 Rear Caliper 7075 Aluminum by GPM MX036  [MX036]

Aluminum Rear Caliper for PROMOTO-MX

This rear caliper is an RC-scale replacement part intended for 1/4 PROMOTO-MX motorcycles, supplied by GPM as MX036. The component is machined from 7075 aluminum to offer a stiffer mounting point compared with stock plastic parts, aimed at maintaining consistent pad alignment during braking and routine track use.

The design purpose is straightforward: provide a durable, serviceable rear caliper that integrates with the bike's existing brake linkage and mounting pattern. It serves as a tuning item for hobbyists who focus on repeatable brake feel and easier maintenance cycles rather than a change in braking theory.

Installation is performed at the hobby bench using common RC tools, verifying mounting screws and rotor clearance during fit-up. Check pad alignment and rotor runout after fitting, and follow regular maintenance intervals to inspect wear surfaces and fasteners.