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

BBX BB-01 steel transmission gears

This is an aftermarket RC-scale transmission gear set produced for the TAMIYA BBX BB-01 1/10 chassis by GPM, intended for the rear transmission housing. The set replaces the factory nylon gears with 40Cr steel teeth to increase wear resistance under repeated load in model use.

The package contains the main transmission gears and a copper collar used at the gear stack, supplied as a small parts set to fit the BB-01 rear gearbox location. The gear set is provided as three gear pcs plus one copper collar, matching the original part arrangement for direct replacement where the chassis layout and mounting points are unchanged.

Practical notes for fitting and tuning: when installing steel gears in place of nylon ones, check gear mesh clearance and the condition of the gearbox bearings, ensure the copper collar sits correctly, and verify smooth rotation before full running. Steel teeth change wear characteristics and can affect drivetrain feel, so after initial installation run at low speeds and confirm no binding occurs.

For BB-01 owners seeking a durable replacement for stock nylon gears, this 40Cr steel gear set is a direct-fit aftermarket option to strengthen the rear transmission; use careful mesh adjustment and inspection after installation.