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

Medium carbon alloy hub sprocket

This replacement hub chain sprocket is a scale drivetrain component for LOSI Promoto-MX motorcycles, supplied as a direct-fit replacement that improves resistance to wear and bending compared with basic stamped parts. Its medium carbon steel construction is well suited to routine maintenance and drivetrain tuning on scale dirt bikes.

The sprocket functions purely as a mechanical drivetrain part: it engages the chain and transfers torque from the pinion and spur area to the rear hub while affecting chain alignment and slack. Replace worn sprockets together with a chain inspection to avoid accelerated wear on the hub and links.

Installation is straightforward for anyone familiar with Promoto-MX wheel maintenance: remove the rear wheel, swap the sprocket using the existing fasteners, then check chain tension and lateral alignment before test runs. Keep all work confined to the RC scale motorcycle and standard RC tools.

Choose this medium carbon steel sprocket when you need a rugged, direct-fit replacement for the listed LOSI Promoto-MX machines and want a long-wearing option for regular drivetrain servicing.