The Serpent 402068 is a compact 5 gram chassis weight made to help drivers tune the X20 chassis balance. Its small mass makes it easy to alter the centre of gravity and improve how the car behaves under braking and cornering.
A modest ballast like this can affect tyre load and mid corner grip. Fitting the 5g weight gives racers a simple way to dial understeer or oversteer without changing suspension geometry. It slots into place cleanly on compatible X20 setups.
Try mounting near the front to calm chassis pitch or towards the rear to get quicker turn-in. Change one location at a time and run several laps to judge the result under your usual track surface and tyre selection.
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