Team Losi Promoto-MX Rear Wheel Hub Hex Upgrade - JR-LMX03-DB by Jazrider  [JR-LMX03-DB]

Aluminum rear hub hex built for Promoto-MX fit

This aluminum rear wheel hub hex is an RC-scale replacement part made for the Team Losi Promoto-MX motorcycle chassis and supplied under the Jazrider JR-LMX03-DB designation. It interfaces between the rear wheel and axle, replacing the stock plastic hex to give a firmer connection and more consistent wheel positioning during riding and setup.

Install this hub when you want a like-for-like swap for Promoto-MX compatible rear wheels, prioritizing secure reassembly and repeatable alignment rather than claimed performance gains. Installation requires removing the original hub from the wheel, seating the aluminum hex into the wheel hub recess, and re-securing with the existing wheel hardware. Inspect mating surfaces and bearings for proper fit and confirm wheel runout after installation.