TAMIYA Hotshot Front Gear Box Upgrade for Tuning JR-THS12-LB by Jazrider  [JR-THS12-LB]

Performance-focused aluminum front gearbox for Hotshot chassis

This aluminum front gear box is a direct-fit replacement for Tamiya Hotshot, Super Hotshot, Boomerang and Bigwig chassis, identified as model JR-THS12-LB. The blue anodized unit replaces the original plastic housing to provide a more rigid mounting point for front drivetrain components while retaining stock geometry.

Fitting the unit is uncomplicated for technicians used to Hotshot-series service; the case accepts the existing screw and alignment points. After installation, set and confirm gear mesh, inspect bearing seating, and normally reuse your existing internal drive parts unless you are upgrading them. The upgrade's main tuning benefit is a steadier front gear alignment that reduces drivetrain flex during heavy acceleration or cornering.

Fits These Models

• Tamiya Hotshot
• Tamiya Super Hotshot
• Tamiya Boomerang
• Tamiya Bigwig

If you are tuning a Hotshot-series car, the JR-THS12-LB aluminum housing offers a straightforward way to stiffen the front drivetrain and support consistent gear engagement under load.