Swift – Progressive Coil Springs | 2.5" I.D. x 12"

Swift – Progressive Coil Springs | 2.5" I.D. x 12"

The Swift Progressive Coil Springs are engineered for maximum compliance and rapid response across changing track conditions. While spring diameters and rates may appear similar between brands, Swift’s manufacturing process and material science are what truly set these springs apart.

These springs are manufactured using Swift’s proprietary HS5.TW steel alloy, developed to maintain critical performance factors while achieving fast reaction speed and improved consistency. Combined with proprietary winding methods, these springs outperform standard market alternatives.

The progressive spring design starts with a lower static spring rate and increases the spring rate through compression, providing improved grip, control, and stability as load increases.

Features & Specifications

• Progressive-rate coil spring
• 2.5" inside diameter
• 12" free length
• Manufactured from HS5.TW proprietary steel alloy
• Lower initial rate that increases with compression
• Designed for fast reaction speed and surface compliance
• Precision wound for consistent performance

Applications

• Performance suspension systems
• Road racing, oval track, and off-road applications
• Setups requiring variable-rate response and compliance