Conv Rear Spring 5in x 13in x 275

The Conv Rear Spring 5in x 13in x 275 from INTEGRA SHOCKS is a conventional coil spring engineered for rear suspension applications on modified and stock vehicles requiring precise load handling and ride control. This steel spring delivers consistent performance for mechanics and enthusiasts building or maintaining independent rear suspension (IRS) systems, where proper spring rate selection is critical to achieving correct ride height, load capacity, and chassis dynamics. Whether you're restoring a classic muscle car, tuning a performance platform, or upgrading a daily driver's rear end geometry, selecting the correct spring rate directly impacts handling balance and suspension compliance.

This conventional coil spring features a 275 pound-per-inch (lb/in) spring rate, meaning it requires 275 pounds of force to compress the spring one inch—a moderate rate suitable for street-driven vehicles and mild performance applications. The 5-inch outer diameter and 13-inch free length allow it to fit compact rear suspension packages without excessive binding or bottoming, while the black powder-coat finish provides corrosion resistance and durability in harsh driving environments. Construction from high-quality steel ensures reliable cycle life through thousands of suspension articulations, maintaining consistent load support without sagging or permanent deformation over extended use.

This spring is ideal for independent rear suspension setups, coilover conversions, and custom chassis builds where OEM springs have been removed or upgraded. Installers should verify ride height, corner weights, and suspension geometry after installation to ensure proper alignment and prevent premature tire wear or handling issues. Pair this spring with matched front springs, quality shocks, and anti-roll bars for balanced suspension tuning. Always consult your vehicle's suspension geometry specifications and consider professional alignment after spring installation to optimize performance and safety.