Available in 25 lb increments and individually dyno tested to ensure accuracy Spring tolerance +/-2-3% Spring material is silicone chrome vanadium with a KTL coating Manufactured by Eibach 39mm Inner Diameter REQUIRES SAR POM Coil Spring Spacer Kit to fit different models of shocks. Springs will not work with 190mm eye-to-eye shocks Ohlins shocks with a traditional reservoir fits a maximum spring rate of 425 lbs. Ohlins shocks with a horizontal reservoir fit all spring sizes Choosing your spring: The stroke of the spring is the amount the spring will compress before binding. To ensure compatibility, the spring stroke must be greater than or equal to your shock&';s stroke. But if you get a spring too long, it will not fit on your shock body. As a rule of thumb, get the spring with shortest stroke that is at least as long as your shock&';s stroke. For help finding your spring rate, check out our Spring Rate Calculator!