King SPR430-22-300 Off-Road Coil Spring ID Length Rate - 4.25 22 300lb

The King SPR430-22-300 is a high-performance off-road coil spring engineered for demanding applications. This precision-wound coil spring features a 4.25-inch internal diameter, 22-inch length, and a 300 lb/in spring rate, making it ideal for custom shock setups on trucks, SUVs, and off-road racing vehicles.

Key Specifications:

• Internal Diameter: 4.25 inches (fits 3.5" shock bodies)
• Spring Length: 22 inches
• Spring Rate: 300 lbs per inch
• Material: High tensile chrome silicon wire
• Ends: Closed and ground for flat seating
• Manufactured in the USA

Features and Benefits:

• Manufactured from the finest quality high tensile chrome silicon wire for superior strength and durability
• Specifically wound for off-road applications, not repackaged automotive springs
• Closed and ground ends ensure the spring sits flat and deflects true under load
• Spring rates, wire diameters, and coil lengths developed through extensive real-world testing across all terrain types
• Race-proven design tested in competition from Baja to Dakar
• Linear spring rate provides predictable, consistent performance
• Universal fitment works with King and other shock brands
• Powder coated for maximum corrosion resistance

Understanding Spring Rates: The 300 lb/in spring rate means compressing this coil one inch requires 300 lbs of force, two inches requires 600 lbs, three inches requires 900 lbs, and so on. This linear progression provides consistent, predictable suspension performance for off-road use.

King maintains one of the largest spring inventories in the off-road industry with over 10,000 springs in stock. Each spring is manufactured to King's exacting specifications in the USA, ensuring the quality and consistency needed for professional racing and serious off-road applications.