LOSI Promoto-MX Rear Brake Rotor - Aluminum JR-LMX07-DB by Jazrider  [JR-LMX07-DB]

RC-Scale Aluminum Rear Rotor for Promoto-MX

This aluminum rear brake disc is a scale replacement specifically produced for the Promoto-MX motorcycle chassis and supplied by Jazrider as model JR-LMX07-DB. It is offered as a more robust rotor option where builders prefer metal hardware over stock plastic.

Fit and compatibility: intended for the Promoto-MX model line. Prior to installation, verify the rotor sits flush on your rear hub and that the mounting holes align with the hub flanges. Avoid forcing the disc onto different chassis unless the mounting pattern is confirmed the same.

Installation tips: use the existing mounting bolts when practical and tighten fasteners in small, even increments to maintain concentricity. Inspect rotor runout by rotating the wheel on a stand and adjust hub position where necessary. Take care not to overtighten to avoid damaging threads.

Brake tuning notes: swapping to an aluminum rotor will change mass and rigidity relative to plastic parts, which can affect pedal feel and heat behavior. Pair with suitable brake pads and evaluate braking at low speed before full use. This product is for model use only, not for real vehicles.