{"product_id":"swift-springs-standard-coilover-spring-id-3-5-18-length","title":"Swift Springs Standard Coilover Spring - ID: 3.5\" \/ Length: 18\"","description":"\u003cp\u003eSwift Springs Standard Coilover Springs in 3.5\" ID and 18\" length are precision-engineered race springs built to outperform conventional suspension springs in every measurable category. Designed for coilover dampers using standard SAE sizing, these 3.5\" ID Swift springs are manufactured in Japan from proprietary H5S.TW high-tensile alloy steel. With fewer coils and reduced unsprung mass, Swift springs deliver increased traction, smoother weight transfer, lower tire temperatures, and the predictable feel that oval track, road course, drag, and off-road racers demand.\u003c\/p\u003e\n\u003cp\u003eWith over 90 years of spring manufacturing expertise, Swift Springs has engineered their standard coilover springs specifically for the American racing market. Unlike conventional springs where switching brands only changes ride stiffness, Swift Springs coilover springs deliver a noticeable increase in traction, smoother weight transfer, lower tire temperatures, and a more predictable feel that racers can tune around. Most Swift springs 10\" and longer feature a barrel design that eliminates spring deflection and bowing — preventing spring rate inconsistency and rubbing against the shock body that can damage adjusting perch threads. All Swift Springs are manufactured using H5S.TW alloy, far superior to standard silicone chrome steel.\u003c\/p\u003e\n\n\u003ch3\u003eSwift Standard Coilover Spring Advantages\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eH5S.TW alloy steel outperforms standard silicone chrome in fatigue resistance and rate consistency\u003c\/li\u003e\n\u003cli\u003eFewer coils reduce unsprung weight and increase available shock stroke\u003c\/li\u003e\n\u003cli\u003eFaster transient response tracks road surface changes for improved mechanical grip\u003c\/li\u003e\n\u003cli\u003ePrecision-engineered for oval track, road course, drag, and off-road racing\u003c\/li\u003e\n\u003cli\u003eConsistent spring rates throughout the life of the spring\u003c\/li\u003e\n\u003cli\u003eMade in Japan with over 90 years of spring manufacturing expertise\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Swift Standard Coilover Springs are sold individually. Select your desired spring rate from the options above.\u003c\/p\u003e\n\u003ctable class=\"table table-striped table-primary\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003ePART #\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSPRING RATE\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eUSABLE STROKE\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eMAX STROKE\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eMAX LOAD\u003c\/strong\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n\u003ctr\u003e\n            \u003ctd\u003e\u003c\/td\u003e\n            \u003ctd class=\"spc\"\u003elbs\/inch\u003c\/td\u003e\n            \u003ctd class=\"spc\"\u003einch\u003c\/td\u003e\n            \u003ctd class=\"spc\"\u003einch\u003c\/td\u003e\n            \u003ctd class=\"spc\"\u003elbs\u003c\/td\u003e\n        \u003c\/tr\u003e\n\u003ctr class=\"spcrow\"\u003e\n\u003ctd class=\"spc\"\u003e180-350-080 BP\u003c\/td\u003e\n\u003ctd class=\"spc\"\u003e80\u003c\/td\u003e\n\u003ctd class=\"spc\"\u003e13.5\u003c\/td\u003e\n\u003ctd class=\"spc\"\u003e\u003c\/td\u003e\n\u003ctd class=\"spc\"\u003e1,077\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n            \u003ctd class=\"spc\"\u003e\u003cstrong\u003e180-350-100 BP\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd class=\"spc\"\u003e100\u003c\/td\u003e\n            \u003ctd class=\"spc\"\u003e13.1\u003c\/td\u003e\n            \u003ctd class=\"spc\"\u003e13.1\u003c\/td\u003e\n            \u003ctd class=\"spc\"\u003e1,315\u003c\/td\u003e\n        \u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n","brand":"Swift Springs","offers":[{"title":"100","offer_id":40350621040700,"sku":"180-350-100 BP","price":153.85,"currency_code":"USD","in_stock":true},{"title":"080","offer_id":44166651412540,"sku":"180-350-080 BP","price":153.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0000\/2183\/products\/swift-springs-standard-coilover-spring-id-3-5-length-18-180-350-100-bp-1194425482.jpg?v=1768203851","url":"https:\/\/www.springrates.com\/products\/swift-springs-standard-coilover-spring-id-3-5-18-length","provider":"SPRINGRATES®","version":"1.0","type":"link"}