The 3Racing Sakura Zero Damper Spring M1.5 x 21 is manufactured for racers who require repeatable suspension response on the Sakura Zero platform. The spring's 21mm free length and 5.50 rate provide a measured balance of stiffness and compliance, allowing for precise adjustments to roll centre reaction and turn in. Use these springs as part of a systematic setup approach alongside shock oil and piston tuning for consistent lap to lap performance.