{"product_id":"eibach-ero-18-off-road-race-springs-3-75-id-1200-500-lb-in","title":"Eibach 18\" Coilover Race Springs – 3.75″ ID | 200–500 lb\/in","description":"\u003cp\u003eOff-road racing demands consistency, durability, and precise spring control. The Eibach Racing Off-Road (ERO) Spring System is engineered to withstand extreme abuse while maintaining accurate spring rate and free length.\u003c\/p\u003e\n\u003cp\u003eFrom desert racing to rock crawling, ERO springs are race-proven in events like:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBaja 1000\u003c\/li\u003e\n\u003cli\u003eDakar Rally\u003c\/li\u003e\n\u003cli\u003eKing of the Hammers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese springs deliver maximum travel, minimal block height, and repeatable performance in both single-rate and dual-rate coilover setups.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3.75″ I.D. Specific Details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAvailable in a silver powder coated finish, ERO 3.75″ I.D. coil springs are offered in a wide range of spring rates rom 200lb\/in to 500lb\/in\u003c\/p\u003e\n\u003cp\u003eBuilt with the highest quality materials, these springs are strong, consistent, and engineered for long service life under extreme off-road conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(1) Eibach ERO Coil Spring (selected rate)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSold Individually\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary class=\"details__header\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cp\u003e\u003cstrong\u003eGeneral ERO Line:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameters:\u003c\/strong\u003e 3.75″\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.75″ ID Length Range:\u003c\/strong\u003e 18\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Rates:\u003c\/strong\u003e 200–500 lb\/in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Silver Powder Coat\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\n\u003cstrong\u003eIndividually Rate Tested\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial \u0026amp; Manufacturing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Chrome Silicon Steel (CrS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing Process:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eCold Wound\u003c\/li\u003e\n\u003cli\u003eHeat Treated\u003c\/li\u003e\n\u003cli\u003eShot Peened\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnds:\u003c\/strong\u003e Squared \u0026amp; Ground at Both Ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Protective Silver Powder Coat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary class=\"details__header\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cp\u003eUniversal fitment for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3.75″ coilover shocks\u003c\/li\u003e\n\u003cli\u003eDual-rate coilover setups\u003c\/li\u003e\n\u003cli\u003eRock crawlers\u003c\/li\u003e\n\u003cli\u003eUltra4 race builds\u003c\/li\u003e\n\u003cli\u003eDesert trucks and prerunners\u003c\/li\u003e\n\u003cli\u003eRock bouncers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eVerify inside diameter matches your coilover body and spring hardware.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary class=\"details__header\"\u003e\u003cstrong\u003eTech Insight\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003cp\u003e\u003cstrong\u003eRace-Proven Durability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eERO springs are engineered to maintain rate and free length even after repeated full compression cycles. They are designed to handle:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExtreme suspension cycling\u003c\/li\u003e\n\u003cli\u003eHigh heat environments\u003c\/li\u003e\n\u003cli\u003eHeavy unsprung weight\u003c\/li\u003e\n\u003cli\u003eContinuous race abuse\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBlock-Stable Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn dual-rate setups, the tender spring is often designed to fully compress (block) to transition into the main spring. ERO springs are built to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSafely block repeatedly\u003c\/li\u003e\n\u003cli\u003eMaintain consistent transition points\u003c\/li\u003e\n\u003cli\u003eResist sagging or rate loss\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision Manufacturing\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvery spring is:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIndividually tested\u003c\/li\u003e\n\u003cli\u003eManufactured to precise tolerances\u003c\/li\u003e\n\u003cli\u003eBuilt for maximum linearity and repeatable performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSquared and ground ends ensure straight, consistent operation and accurate preload setup — critical for corner balancing and fine suspension tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Eibach","offers":[{"title":"200lb\/in.","offer_id":56217075613862,"sku":"EIB1800.375.0200S","price":160.0,"currency_code":"USD","in_stock":true},{"title":"250lb\/in.","offer_id":56217075646630,"sku":"EIB1800.375.0250S","price":160.0,"currency_code":"USD","in_stock":true},{"title":"300lb\/in.","offer_id":56217075679398,"sku":"EIB1800.375.0300S","price":160.0,"currency_code":"USD","in_stock":true},{"title":"350lb\/in.","offer_id":56217075712166,"sku":"EIB1800.375.0350S","price":160.0,"currency_code":"USD","in_stock":true},{"title":"400lb\/in.","offer_id":56217075744934,"sku":"EIB1800.375.0400S","price":160.0,"currency_code":"USD","in_stock":true},{"title":"450lb\/in.","offer_id":56217075777702,"sku":"EIB1800.375.0450S","price":160.0,"currency_code":"USD","in_stock":true},{"title":"500lb\/in.","offer_id":56217075810470,"sku":"EIB1800.375.0500S","price":160.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/EibachCoilSpring1800.375.webp?v=1783001560","url":"https:\/\/wideopendesign.com\/products\/eibach-ero-18-off-road-race-springs-3-75-id-1200-500-lb-in","provider":"Wide Open Design","version":"1.0","type":"link"}