This 40g center balance weight is made for BD8 on-road chassis and is supplied in steel to alter the centre of mass on RC models. The part is intended as added mass to help tune handling balance and is not designed to change suspension geometry or other components.
In practical tuning the weight shifts the chassis centre of gravity toward the mounting location, which can help with understeer and oversteer transitions, improve traction on corner exit, and increase straight-line stability depending on the overall setup. Its role is strictly as ballast for fine adjustments during track setup.
Installation is straightforward when compatible mounting points are available on the BD8 chassis; the weight is designed to sit on the vehicle centreline so it affects fore-aft and lateral balance in a predictable way. Try removing or relocating the weight to compare handling before making other setup changes.
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