This rear hub hex is a direct-fit aftermarket replacement for LOSI PROMOTO-MX rear wheel assemblies, designated MX007. Machined from 7075-T6 aluminum for dimensional stability, it is intended to replace the stock hub hex and handle wheel loads without excessive flex.
The profile accepts larger inner bearings and features a bearing positioning column to stabilise the bearing seats during assembly. The included bearings match common RC sizes listed below, and when installed with compatible drivetrain parts the hub aligns with the Promoto-MX rear wheel face and mainshaft without extra modification.
For setup and maintenance the rigid aluminium face reduces wheel-to-axle play and helps retain alignment when changing bearings or adjusting drivetrain tolerances. Verify axle hex width and bearing fit, and use an appropriate hex driver and bearing press for a secure installation.
LOS262012,LOS262014
Choose this hub hex when servicing or upgrading the rear wheel on the listed PROMOTO-MX models; confirm dimensional compatibility before final fitment and follow standard RC wheel assembly practice.
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