This RC-scale rear wheel hub hex fits Team Losi Promoto-MX motorcycle kits and is produced as model JR-LMX03-RD. It swaps in for the original rear hex to restore a tight wheel-to-axle mating while keeping a compact aluminium construction and a red finish chosen for tuned bike styling.
Fitting follows the standard swap routine: remove the rear wheel, exchange the factory hex for this unit and secure it using the vehicle's original fasteners. The part is intended as a plug-in spare or hop-up and will not change the drivetrain geometry.
From a tuning perspective the hex reduces wheel interface play and helps maintain consistent wheel alignment during hard use, delivering more predictable handling without complicating service procedures.
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