7-Inch 65mm ID 20.0kgf/mm Coilover Springs

Utilizing Swift's proprietary HS5.TW material, these springs are the result of extensive development aimed at creating a component that is exceptionally light, durable, and compliant, all while maintaining precise, linear spring rates. This dedication to quality, backed by over 90 years of industrial spring manufacturing experience from Swift, ensures a reliable and high-performing suspension upgrade. Each spring measures 7 inches in length with a 65mm inner diameter, designed to fit a wide range of coilover systems. The spring rate is set at a firm 20.0kgf/mm (equivalent to 1,120 lbs/inch), providing a significant upgrade in handling characteristics. Key specifications include a usable stroke of 70mm (2.8 inches) and a maximum stroke of 106mm (4.2 inches), contributing to improved traction, smoother weight transfer, and a more predictable feel. These benefits translate to better ride quality, lower tire temperatures, and reduced unsprung weight. These K-Tuned springs are universally applicable, making them a versatile choice for both daily-driven vehicles and dedicated race cars. They are manufactured in Japan and are sold in pairs, ensuring you have the necessary components for an axle or suspension corner.