Coil-Over Spring 16in x 5in x 125lb 2.5in ID

The SWIFT SPRINGS Coil-Over Spring 16in x 5in x 125lb with 2.5in ID is a high-performance coil spring engineered for suspension systems demanding precise spring rates and long-term durability. This 16-inch coil-over spring features a 125 lb/in spring rate with a 2.5-inch inner diameter, making it suitable for custom suspension tuning in off-road vehicles, race trucks, and performance platforms where load control and ride quality are critical.

Built from steel with a protective copper powder coat finish, this coil spring resists corrosion and maintains structural integrity through extended use in harsh environments. The 125 lb/in spring rate defines how much force is required to compress the spring one inch—a moderate rate that balances compliance for terrain absorption with sufficient stiffness to prevent excessive body roll during cornering or load shifts. At 5.35 lbs and 16 inches in length, the spring integrates into compact coil-over assemblies without requiring custom fabrication or clearance modifications on most applications.

This coil-over spring is specified for builds where suspension geometry and spring selection directly impact handling dynamics. Buyers selecting springs with 125 lb/in rates typically operate vehicles with moderate payload capacity or prioritize comfort-biased tuning over maximum load-carrying stiffness. The copper powder coat offers UV and corrosion resistance, extending service life in salt spray, high-humidity, or off-road conditions where bare steel would degrade. Verify fitment to your coil-over shock body's ID specification and total compressed height before ordering to ensure compatibility with your suspension platform.