The JR-TBB04-GU servo stay is an aluminium upgrade designed for the TAMIYA BB-01 (BBX) chassis. It provides a solid mounting point to minimise servo movement and keep steering inputs stable under load.
Finished in gun metal, the part is intended as a direct-fit swap for the stock plastic stay on BB-01 (BBX) cars. Users replace the original stay when seeking a firmer steering feel and reduced flex in the servo bay.
Structurally, the stay limits mount deflection and helps maintain steering geometry during cornering and heavy inputs, which clarifies the effects of servo and link adjustments when tuning the car.