TAMIYA BBX BB-01 Rear Transmission Gear Upgrade 40Cr Steel BBX1200S by GPM  [BBX1200S]

BB-01 rear transmission steel gear kit

This aftermarket gear kit is crafted for the TAMIYA BBX BB-01 1/10 chassis and swaps the stock nylon gears for hardened 40Cr steel teeth to reduce wear during repeated running. The components are laid out to match the BB-01 rear gearbox for a direct replacement where the chassis uses the standard rear gearbox location.

The contents include the three main transmission gears plus a copper collar for the gear stack, supplied as a small replacement set for the BB-01 rear housing. The count and arrangement follow the original parts so fitment is straightforward when the gearbox layout is unchanged.

Fitting guidance: inspect gearbox bearings and check mesh clearance when installing steel gears, ensure the copper collar seats correctly, and rotate the gearbox by hand to confirm smooth operation before testing. Steel gears alter contact patterns and may require a short run-in and final mesh readjustment.

If you need a more wear-resistant rear transmission for the BB-01, this 40Cr steel set is a direct-fit aftermarket option when installed with correct mesh and inspection routines.