URGE designs is a big believer in Swift Springs and have always recommended upgrading to Swift Springs when the opportunity presents itself.  Please take a few minutes to understand why.

HS5.TW Proprietary Material

It’s all in the material.  Typical aftermarket springs are made out of a chrome silicone steel and although there is nothing wrong with this material, Swift saw this as an opportunity to improve and differentiate themselves.  HS5.TW was designed to improve strength to weight ratio of versus common chrome silicone steel while maintaining high elasticity providing simple undisputed benefits.

1. Lighter weight:  Less material is needed to provide a static rating and Swift Springs tend to be ~xx% Lighter
2. Increased Travel:  Since less material is needed, less coils are needed which provide more travel before bind
3. Improved Linear Rate:  More overall spring travel means more travel before bind when spring rates change
4. Less Spring Settle:  Along with the improved material characteristics, the above the properties mean Swift Springs incur less overall stress as they stay within their optimal travel range improving fatigue life and consistency over the springs lifetime

Increased Dynamic Response & Improved Feel

Less weight, increased travel and improved linear rate are all quantifiable attributes, but how can a spring improve Feel?  An optimal suspension and spring would absorb bumps while maintaining optimal tire contact.  Springs are designed to support the weight of the car and return the suspension to middle of its desired range.  As measured in pounds per Inch or kilograms per mm, springs create a resistive force based upon compression.   During each bump or after a dip or hill, the spring is attempting to lift the corner of the car based upon reactive force.  There is a fine balance of lift vs absorption during the compression stroke and that is where dynamic response comes into play.

Springs are quantified based upon a slow static compression and the measured returned force per compressed length.  Ironically, suspension springs will rarely experience slow compression.  Spring dynamics are much more important but there is no industry rating to compare.  Based upon measurable characteristics mentioned above (lighter weight and increased travel) as well as having a higher natural material frequency, Swift Springs react to movements quicker.  Swift Springs provide less lift during faster movements and absorb the road characteristics and tire movement improving tire contact, grip and reducing tire wear.

Swift Value

In general springs cost ~1/10th of the actual suspension itself and thinking a “Spring is a Spring” is leaving performance on the table for something that is relatively low cost compared to tires and suspension.  Together, tires and suspension are the most important performance parts you can buy as a 10% increase in grip improves lap times more than 100% increase in power.  So why not spend 50% more on the least expensive part of your suspension for the quantifiable benefits alone?  That should justify the potential to experience the dynamic and feel benefits that Swift Springs provide.