LOSI Promoto-MX Motorcycle Aluminum Rear Wheel Hub Hex by JAZRIDER JR-LMX03-DB  [JR-LMX03-DB]

Aluminum rear wheel hub hex for Promoto-MX

This aluminum rear wheel hub hex is an RC-scale replacement part designed for Team Losi Promoto-MX motorcycle chassis, supplied under the JAZRIDER JR-LMX03-DB designation. It serves as the interface between the rear wheel and the axle, replacing a stock plastic hex to provide a firmer mechanical connection and more consistent wheel positioning during riding and setup adjustments.

Use this hub when you need a direct swap for Promoto-MX compatible rear wheels, focusing on secure reassembly and repeatable alignment rather than performance claims. Installation involves removing the original hub from the wheel assembly, fitting the aluminum hex into the wheel hub recess, and re-securing using the wheel hardware already present on the motorcycle. Inspect mating surfaces and bearings for correct fit before use and verify wheel runout after installation.