TAMIYA BBX BB-01 40Cr Hardened Rear Transmission Gear Set BBX1200S by GPM  [BBX1200S]

Hardened rear transmission gears for BB-01

This aftermarket gear set is manufactured for the TAMIYA BBX BB-01 1/10 chassis and replaces the original nylon gears with 40Cr hardened steel teeth to extend service life under repeated running. The parts are arranged to match the BB-01 rear gearbox so they can be used as a direct replacement when the chassis rear layout remains unchanged.

The set ships with the three core transmission gears and a copper collar that fits into the gear stack, supplied as a small replacement kit for the BB-01 rear housing. The component count mirrors the factory arrangement to simplify fitment.

Installation notes: when switching from nylon to steel, inspect the gearbox bearings, verify the copper collar seating, and adjust gear mesh carefully. Rotate the gearbox assembly by hand before powered testing to confirm smooth operation and perform a short brake-in run to check for any unusual noise or binding.

This 40Cr steel gear set is a practical direct-fit aftermarket option for BB-01 owners who want improved wear resistance, provided correct mesh and regular inspections are performed after installation.