Losi Promoto-MX Rear Wheel Hub Hex Aluminum by JAZRIDER JR-LMX03-RD  [JR-LMX03-RD]

Rear wheel hub hex for Promoto-MX

This is an RC-scale rear wheel hub hex designed for use with Team Losi Promoto-MX motorcycle models, supplied by JAZRIDER as model JR-LMX03-RD. The part replaces the stock rear wheel hex to restore a secure interface between the wheel and axle while keeping a compact, lightweight aluminium profile and a red finish for visual match to tuned bikes.

Installation is a direct replacement: remove the rear wheel assembly and swap the existing hex for this unit, then secure with the original fastening hardware from the vehicle. The component is intended as a plug-in spares/hop-up for Promoto-MX scale dirt bikes and does not change drivetrain geometry.

In a tuning context this hub hex serves to reduce play at the wheel interface and maintain consistent wheel alignment under load, helping with predictable handling during dirt riding and setup adjustments while keeping serviceability straightforward.