A higher quality spring greatly improves the performance of your coil shock. VALT springs from Cane Creek are much lighter than traditional steel springs while pushing the boundaries of performance and durability. - Inner diameter of 36.5mm is compatible with all Cane Creek coil shocks - Also compatible with Manitou, Marzocchi, XFusion, ELKA/MRP, BOS and DSP - Compatible with Fox coil shocks with required spring clip adaptor