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

Steel transmission gears for BB-01 rear box

This aftermarket transmission gear set is intended for the TAMIYA BBX BB-01 1/10 chassis and replaces the factory nylon gears with hardened 40Cr steel teeth to improve resistance to wear under repeated load. The set aligns with the BB-01 rear gearbox configuration for a direct replacement when the mounting points are standard.

The package contains the three main gears and a copper collar that locates in the gear stack, supplied as a compact parts set for the rear transmission. The number of items and arrangement mirror the original parts so installation is straightforward for a matching BB-01 rear layout.

Practical installation advice: inspect bearings and verify gear mesh clearance after fitting steel gears, confirm the copper collar is correctly positioned, and rotate the gearbox manually to ensure free movement prior to powered testing. Steel teeth will change wear characteristics and may need a short bedding-in period with subsequent mesh readjustment.

For BB-01 owners seeking a tougher rear transmission than stock, this 40Cr steel gear set offers a direct-fit aftermarket upgrade provided careful mesh setup and inspection are performed.