King SPR375-20-300 Off-Road Coil Spring 3.75" ID x 20" Length 300 lb Rate

The King SPR375-20-300 is a high-performance off-road coil spring designed specifically for demanding suspension applications. This coil features a 3.75-inch inside diameter, 20-inch free length, and a 300 lb per inch spring rate, making it ideal for coil-over shock setups on trucks, buggies, and off-road racing vehicles.

Premium Construction:

• Manufactured in the USA using high tensile, chrome silicon wire for maximum strength and durability
• Each spring has the rate etched in the top for clear identification after hard use
• Closed and ground ends sit flat and deflect true for consistent performance
• Specifically wound for off-road applications with spring rates, wire diameters, and coil lengths developed through extensive real-world testing

Performance Features:

• Linear spring rate: 1 inch of compression generates 300 lbs of force, 2 inches generates 600 lbs, 3 inches generates 900 lbs
• Compatible with King and other brands of 3.0-inch outside diameter coil-over shocks
• Can be used in single or dual-rate configurations for customized suspension tuning
• Universal fitment for custom off-road suspension builds

King's race-winning designs have been proven in competition from Baja to Dakar, delivering the consistent spring rates and durability demanded by professional racers and serious off-road enthusiasts. Sold individually.