The XRAY 308263 4S Progressive Spring Set is built to sharpen your SLP shock setup. These 20mm springs start at a C2.3 rate and progressively firm to C2.6 as the shock compresses, helping maintain traction and controlled rotation through corners for a balanced feel on the track.
Progressive springs provide an initial softer rate for bite, then increase stiffness as the chassis loads, letting you carry speed deeper into corners while preventing excessive body roll. This behaviour benefits racers seeking consistent mid-corner balance and predictable handling under load.
Every pair of XRAY 4S springs is hand measured and matched to ensure consistent length and damping characteristics, so each set gives repeatable behaviour and makes setup changes more reliable during race day.
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