LOSI Promoto-MX Rear Brake Disc Compatible with Promoto-MX JR-LMX07-DB by Jazrider  [JR-LMX07-DB]

Rear Brake Rotor Built for Promoto-MX Chassis

This aluminum rear brake disc is an RC-scale replacement created for the Promoto-MX motorcycle chassis and supplied by Jazrider as model JR-LMX07-DB. It is intended as a robust rotor choice where a metal disc is preferred over the stock plastic component for scale builds.

Fit guidance: manufactured for the Promoto-MX series. Before installing, ensure the rotor sits flush against the hub and the screw holes align with your rear hub flanges. Do not force the disc onto incompatible hubs without confirming the pattern.

Installation guidance: reuse original mounting hardware when applicable and tighten screws progressively and evenly to maintain alignment. Inspect for runout by spinning the wheel on a stand and make minute adjustments to hub position if necessary. Avoid excessive torque to protect threads.

Tuning commentary: fitting an aluminum disc changes both stiffness and thermal characteristics compared with plastic, which may alter braking response and fade behavior. Use compatible brake pads and perform controlled low-speed tests to dial in braking before normal use. This product is for model use only and is not suitable for real vehicles.