Product Details
Swift Springs Standard Coilover Springs (Barrel Type Progressive) in 2.5" ID and 10" length feature a dual-rate design that provides a softer initial rate for compliance over bumps, transitioning to a stiffer rate under load for cornering stability. These 2.5" ID Swift progressive coilover springs are manufactured in Japan from proprietary H5S.TW high-tensile alloy steel, combining the barrel design's anti-deflection properties with variable-rate spring behavior for applications that demand both comfort and performance.
With over 90 years of spring manufacturing expertise, Swift Springs has engineered these progressive barrel springs for racers and enthusiasts who need the best of both worlds — a compliant initial rate for rough surfaces and a firm secondary rate for high-load cornering. All Swift coilover springs use proprietary H5S.TW alloy, delivering superior fatigue resistance and rate consistency compared to standard silicone chrome steel.
Why Racers Choose Swift Springs Coilover Springs
- Progressive dual-rate design: softer initial rate, stiffer under load
- Proprietary H5S.TW alloy delivers superior fatigue resistance and consistent spring rates
- Barrel design eliminates spring deflection and bowing
- Fewer coils reduce unsprung weight and maximize usable shock stroke
- Quicker transient response improves traction and road surface tracking
- Trusted by professional racing teams worldwide — Swift Springs coilover springs are proven in competitive motorsport
Note: Swift Coilover Springs are sold individually. Select your desired spring rate from the options above.
Specifications
| PART # | SPRING RATE | USABLE STROKE | MAX STROKE | MAX LOAD |
| lbs/inch | inch | inch | lbs | |
| 100-250-500 V | 200/500 | 4.7 | 5.1 | 1,834 |
| 100-250-575 V | 250/575 | 4.9 | 5.2 | 2,143 |
| 100-250-750 V | 300/750 | 3.9 | 4.4 | 2,690 |