LOSI Promoto-MX Motorcycle Aluminum Rear Brake Disc by JAZRIDER JR-LMX07-RD  [JR-LMX07-RD]

Rear brake disc for Promoto-MX

This is an RC-scale rear brake disc produced for Team Losi Promoto-MX motorcycle models and sold under JAZRIDER part number JR-LMX07-RD. The component is aluminum with a red finish and intended as a direct replacement or upgrade for the rear braking assembly on the Promoto-MX platform.

As an accessory for RC dirt bikes, the disc focuses on consistent braking response and routine maintenance compatibility rather than altering drivetrain or motor performance. It is supplied as a single RC-scale brake disc intended for rear hub installation and for use only on compatible Promoto-MX chassis.

Installation and setup: this part replaces the existing rear brake disc and works within the Promoto-MX rear hub geometry, helping hobbyists tune rear braking feel and manage heat buildup during extended practice sessions. No vehicle or full-scale implications are implied, this is a model-only replacement part.