The XRAY 308263 4S Progressive Spring Set complements SLP shock units with 20mm progressive springs that start around C2.3 and firm to C2.6 under load. This progression helps tyres bite on turn entry then deliver firmer support mid-corner for cleaner exits.
These springs offer a softer initial phase for improved mechanical traction, then add stiffness as the chassis compresses to prevent excessive roll. The result is steadier steering and more confidence when opening the throttle out of turns.
XRAY hand checks and matches each pair of 4S springs to make sure lengths and spring characteristics are consistent, reducing variability and helping you reproduce setups between practice sessions.
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