TAMIYA Hotshot/Super Hotshot/Boomerang/Bigwig Aluminum Rear Gear Box by JAZRIDER JR-THS13-LB  [JR-THS13-LB]

Aluminum rear gearbox for TAMIYA Hotshot series

This JAZRIDER JR-THS13-LB aluminum rear gear box is presented as a direct-scale upgrade part for TAMIYA Hotshot, Super Hotshot, Boomerang and Bigwig chassis. The unit replaces the stamped plastic housing with a machined aluminum assembly finished in blue anodizing, offering a firmer mounting point for internal gears and bearings when compared to the original plastic part.

Intended role and fitment: the component is positioned as a rear gearbox housing that locates existing spur gear and pinion alignment inside the rear section of the chassis. Use it when you want a heavier-duty housing to reduce flex in the drivetrain under higher loads or when experimenting with different gear mesh and bearing arrangements.

Installation and service notes: the piece follows the stock mounting footprint for the listed TAMIYA models so it integrates with the original bolt pattern and internal layout. Access to the internal gears is via the same removable cover points used on the original housing, allowing routine inspection and bearing replacement without altering the chassis main parts.

For builders focused on tighter drivetrain feel and more rigid gearbox mounting on classic TAMIYA Hotshot-series models, this JAZRIDER aluminum rear gear box provides a straightforward upgrade that maintains original layout while offering a metal alternative to the factory housing.