The Yokomo YAS-650A is a purpose-built front shock spring for RC racing on high-traction carpet and artificial turf. Its big-bore form factor and shorter free length let you lower the car while maintaining controllable rebound, reducing the tendency to snatch or flip when touching down from jumps.
In terms of setup, the spring alters suspension response without swapping shock components. Expect a firmer midstroke compared to standard short springs, which helps limit high-side roll and keeps the chassis more settled through faster corners. Installation is identical to other front coils: change the spring on the shaft, set the correct preload, then verify oil and piston choices for the new spring dynamics.
Opt for this spring when you need a quicker rebound response on grippy tracks and want to run a slightly reduced ride height without sacrificing stability off jumps.
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