Conventional Spring 9.5in x 5in x 525lb

The Conventional Spring 9.5in x 5in x 525lb from SWIFT SPRINGS is a premium coil spring engineered for performance suspension builds and vehicle modifications. This component serves as the foundation for lowering kits, lift systems, and custom chassis work where precise load-bearing capacity and consistent ride height control are essential. Whether you're upgrading a street machine, preparing a track-focused platform, or fine-tuning a restoration project, this spring delivers the reliability and repeatability that serious mechanics demand from OEM-grade suspension hardware.

With a spring rate of 525 pounds per inch, this conventional design provides moderate resistance suitable for dual-purpose applications—street comfort paired with handling responsiveness. The 9.5-inch free length and 5-inch compressed dimension yield predictable deflection curves, allowing technicians to calculate ride height adjustments and corner weight distribution with confidence. SWIFT SPRINGS' manufacturing tolerances ensure minimal variance between units, critical when running multiple springs in a four-corner setup where imbalanced rates cause uneven load distribution, tire wear, and handling inconsistency. The compact 6.35-pound weight and manageable dimensions facilitate installation in confined engine bays and frame rails common to modern and classic platforms alike.

Fabricators and enthusiasts upgrading independent front suspension (IFS), multi-link rear systems, or traditional leaf-spring platforms will find this spring particularly valuable for achieving target ride frequencies between 1.5 and 2.5 Hz—the sweet spot for responsive yet manageable handling. Installation typically requires removal of the existing spring, positioning the new unit in the spring pocket or perch, and torquing mounting hardware per chassis specifications. Stack multiple units in parallel configurations for stiffer responses in heavy-duty or racing scenarios, or pair with complementary dampers and anti-roll bars to maximize the suspension's geometry. Verify bore diameter and mounting interface compatibility with your specific vehicle platform before purchase.