The 25mm spring from Yokomo is designed for R/C drift setups where a medium-hard rate gives the necessary support without sacrificing slide control. This rating provides firmer feedback than soft springs while preserving manageable transitions.
Fit the spring onto compatible shock assemblies by seating it correctly on the shaft and confirming end-cap position and preload. Evaluate ride height, camber change under compression, and damping interaction after any change to judge handling impact.
In practice, a medium-hard spring reduces throttle squat and curbs body roll during slides, aiding stability on corner exit. The pink marking is an easy way to spot this rate among others during setup work.
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