Fox Suspension SLS MTB Rear Shock Spring (3.15" Travel)This mountain bike (MTB) rear shock spring comes kitted out with a Super Light Steel (SLS) construction that’s lighter than titanium springs and more affordable. It’s equipped with a proprietary surface treatment and stress relief process that removes residual stresses from the spring, allowing it to withstand higher stresses. Each spring is also optimised by using a smaller wire diameter and fewer coils, creating a lighter spring. Compatible with Fox DHX2 and Van RC rear shocks from 2016 onwards. All SLS springs are orange and are marked with their spring rate in lbs/in (in 25lb increments) and the maximum travel of the shock that they are designed to be paired with.Please note: This model is intended for Fox DHX2 and Van RC rear shocks from 2016 onwards. If you have a rear shock that’s from before 2016, an SLS spring retainer is required (available separately).Features: Material: Super Light Steel (SLS) Use: MTB Type: Rear Shock Spring Spring Travel: 3.15" Inner Diameter: 1.385 inches (35mm)) Compatibility: Fox DHX2 and Van RC rear shocks (2016+) Size: Multiple options available to selectManufacturer’s Part Number: 033-22-046 Orange 375lb 033-22-047 Orange 400lb 033-22-048 Orange 425lb 033-22-049 Orange 450lb 033-22-050 Orange 475lb 033-22-051 Orange 500lb 033-22-063 Orange 525lb 033-22-052 Orange 550lbBuy Fox Suspension Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.