Ohlins Coilover Springs are sold individually. Each spring can be purchased for use on Ohlins Coilovers and/or to change the spring rates for Ohlins Coilovers. Some Ohlins Coilovers do not include springs so they must be purchased separately. All Ohlins Springs use a 65mm inner diameter (ID). When customizing Ohlins Coilovers, we strongly