Promoto-MX Hub Chain Sprocket Medium Carbon Steel MX036S for LOSI by GPM  [MX036S]

Medium carbon steel replacement sprocket

This hub chain sprocket is designed as a direct-fit replacement for LOSI Promoto-MX scale motorcycles, upgraded to medium carbon steel to provide enhanced wear resistance and improved bending strength versus basic stamped components. It is suitable for routine maintenance and tuning on scale dirt bikes.

The component serves a mechanical role in the drivetrain by engaging the chain and transferring torque from the motor pinion and spur area to the rear hub, also affecting chain alignment and slack. Inspect adjacent drivetrain parts when replacing a sprocket to avoid premature problems.

Installation follows standard Promoto-MX rear wheel procedures: remove the wheel, swap the sprocket using existing hardware, then set chain tension and check lateral alignment. Keep the work within RC scale procedures and use appropriate RC tools.

Select this medium carbon steel sprocket when you want a reliable, direct replacement for the listed LOSI Promoto-MX variants and a durable choice for regular drivetrain upkeep.