{"product_id":"eibach-platinum-rear-spring-18in-x-5-0in-od","title":"Eibach Platinum Rear Spring | 18in x 5.0in OD","description":"\u003ch2\u003eEibach Platinum Rear Coil Springs – 5.00in OD x 18.00in Length – Premium Ultra-High Tensile Steel Performance\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eEibach Platinum Series Rear Coil Springs (5.00in OD x 18.00in Length)\u003c\/strong\u003e set the standard for precision, strength, and consistency in performance suspension design. Engineered using Eibach’s proprietary ultra-high tensile steel, these springs deliver exceptional travel, tight rate tolerances, and industry-leading fatigue resistance. Available in \u003cstrong\u003e50 lb\/in, 75 lb\/in, and 100 lb\/in rates\u003c\/strong\u003e, they provide tailored performance for every build — from race-prepped vehicles to precision street applications.\u003c\/p\u003e\n\u003cp\u003eWhether you’re dialing in a coilover system for desert racing, tuning a track car for corner balance, or designing a high-travel suspension for off-road use, Eibach’s Platinum Series ensures exact geometry and consistent damping behavior every time.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eEngineered for Maximum Travel and Strength\u003c\/h2\u003e\n\u003cp\u003eEvery \u003cstrong\u003eEibach Platinum Spring\u003c\/strong\u003e starts with a foundation of advanced metallurgical engineering. By utilizing ultra-high tensile steel with exceptional yield strength, Eibach achieves more travel and less deflection compared to traditional racing springs — without compromising rate accuracy or load control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngineering Highlights:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-Lightweight Construction:\u003c\/strong\u003e Reduces unsprung mass for faster suspension response.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMore Travel \/ Less Deflection:\u003c\/strong\u003e Maximizes suspension articulation under compression and rebound.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBlock Resistant:\u003c\/strong\u003e No rate loss or coil bind, even at full compression.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConsistent Rate Control:\u003c\/strong\u003e Maintains exact load characteristics through repeated cycles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision Wound Ends:\u003c\/strong\u003e Flat-ground configuration ensures perfect seat contact and load distribution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach spring is engineered to meet ±1% rate tolerance — a precision level far beyond typical OEM or aftermarket standards.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eBuilt for Professional-Level Suspension Systems\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eEibach 5.00” OD x 18.00” Length Platinum Rear Coil Spring\u003c\/strong\u003e is ideal for applications requiring balanced load distribution, predictable rate response, and consistent performance across varied terrains or track conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOff-Road Racing \u0026amp; Desert Trucks:\u003c\/strong\u003e Handles massive travel ranges and variable loads under high-speed terrain.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTrack \u0026amp; Circuit Cars:\u003c\/strong\u003e Provides stable compression characteristics for corner balance and predictable weight transfer.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUTV \u0026amp; SXS Performance:\u003c\/strong\u003e Lightweight and precise for long-travel coilover systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCustom Fabrication Projects:\u003c\/strong\u003e Seamlessly integrates with coilover conversions, chassis builds, and race-spec suspensions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe combination of strength, travel capacity, and fatigue life makes the Platinum Series a go-to spring for professional builders who refuse to compromise on performance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv class=\"_tableContainer_1rjym_1\"\u003e\n\u003cdiv class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth data-col-size=\"sm\"\u003eAttribute\u003c\/th\u003e\n\u003cth data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003eEibach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eSeries:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003ePlatinum Rear Spring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003e5.00 in (127 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eFree Length:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003e18.00 in (457 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003eUltra-High Tensile Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eFinish:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003ePlatinum Powder Coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eSpring Rates Available:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003e50 lb\/in, 75 lb\/in, 100 lb\/in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eEnd Type:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003eFlat Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eConfiguration:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003eSingle Coil Spring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-col-size=\"sm\"\u003e\u003cstrong\u003eCategory:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\"\u003eSuspension › Coil Springs › Rear Springs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eEach spring is individually tested to confirm linearity, rate accuracy, and block resistance. Dimensional tolerances are maintained to within ±1 degree on end parallelism, ensuring consistent seat alignment across every spring set.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eThe Eibach Advantage: Race-Proven Technology\u003c\/h2\u003e\n\u003cp\u003eEibach’s engineering process combines precision material control, automated winding, and post-processing treatments to produce springs that retain their shape, rate, and performance over thousands of cycles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturing Highlights:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eShot-peened surface for improved fatigue strength\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeat-treated for dimensional stability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePre-set multiple times to eliminate settling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePowder-coated for corrosion resistance and professional finish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese quality measures ensure that every Platinum Series spring performs consistently under extreme temperatures, vibration, and continuous load — even after years of use.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eConsistent Performance Under Extreme Conditions\u003c\/h2\u003e\n\u003cp\u003eEibach’s \u003cstrong\u003ePlatinum Series\u003c\/strong\u003e springs are renowned for their ability to maintain dimensional stability and spring rate integrity, even in high-load, high-travel environments. Unlike conventional coil springs that lose height or change rate over time, Platinum Series coils maintain their engineered characteristics from installation through race day and beyond.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eMaintains spring height and rate under extended use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLinear load curve for predictable handling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExcellent fatigue resistance for long-term reliability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMinimal rate deviation across repeated cycles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery Eibach spring is manufactured under ISO 9001-certified conditions and tested to precise standards for compression, rebound, and temperature stability.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTailored Rate Options for Custom Suspension Tuning\u003c\/h2\u003e\n\u003cp\u003eWith \u003cstrong\u003ethree available rates\u003c\/strong\u003e — \u003cstrong\u003e50 lb\/in\u003c\/strong\u003e, \u003cstrong\u003e75 lb\/in\u003c\/strong\u003e, and \u003cstrong\u003e100 lb\/in\u003c\/strong\u003e — builders can fine-tune suspension behavior for their exact performance goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e50 lb\/in:\u003c\/strong\u003e Ideal for lightweight vehicles or applications requiring high travel and soft damping response.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e75 lb\/in:\u003c\/strong\u003e Balanced option for street performance, track cars, or moderate off-road use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e100 lb\/in:\u003c\/strong\u003e Best suited for heavier vehicles or builds requiring higher resistance to bottoming out under load.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese variants provide flexibility to achieve the perfect balance of control, comfort, and responsiveness in any configuration.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eApplication Examples\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDesert Racing Trucks \u0026amp; Pre-Runners:\u003c\/strong\u003e Delivers consistent spring control through long-travel, high-speed terrain.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUTV Coilover Conversions:\u003c\/strong\u003e Reduces unsprung weight while maintaining preload precision.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTrack Cars \u0026amp; Drift Builds:\u003c\/strong\u003e Provides linear handling characteristics and stable corner balance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStreet Performance \u0026amp; Custom Fabrication:\u003c\/strong\u003e Offers race-grade precision for everyday reliability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNo matter the environment, Eibach springs maintain their performance characteristics, helping drivers and builders achieve repeatable, measurable gains in both comfort and control.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eEibach: Precision Engineering for Performance Builders\u003c\/h2\u003e\n\u003cp\u003eFor over 70 years, \u003cstrong\u003eEibach\u003c\/strong\u003e has defined the standard in performance suspension. Their springs are trusted by world-class motorsport teams and OEM manufacturers because of their consistency, rate accuracy, and ability to perform under extreme conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned, tested, and manufactured to exacting German and U.S. standards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUsed by leading race teams and off-road manufacturers worldwide\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBacked by Eibach’s reputation for durability, precision, and innovation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you choose Eibach, you’re investing in proven performance that translates directly into better handling, more confidence, and more control.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Buy from Fenix Motorsports\u003c\/h2\u003e\n\u003cp\u003eAt \u003cstrong\u003eFenix Motorsports\u003c\/strong\u003e, performance isn’t optional — it’s precision engineered. Every product in our catalog is carefully selected, tested, and validated by enthusiasts who live the same high-performance lifestyle as our customers. From desert racing to daily drivers, our focus is on providing parts that perform when it matters most.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen you buy from Fenix, you get:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eGenuine, race-proven Eibach components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExpert, enthusiast-backed technical support\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFast U.S. shipping and easy returns\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAccess to premium performance brands like \u003cstrong\u003eEibach, FOX, KING, Rigid Industries, Baja Designs, and NRG Innovations\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWe don’t just sell suspension components — we rely on them. Whether you’re fabricating your dream build or chasing a podium, \u003cstrong\u003eFenix Motorsports\u003c\/strong\u003e delivers the reliability and performance you can count on.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Fenix? Because precision is power.\u003c\/strong\u003e\u003c\/p\u003e","brand":"EIBACH","offers":[{"title":"50 lb\/in","offer_id":50688784171266,"sku":"EIBPR1800.500.0050","price":151.99,"currency_code":"USD","in_stock":true},{"title":"75 lb\/in","offer_id":50688784204034,"sku":"EIBPR1800.500.0075","price":151.99,"currency_code":"USD","in_stock":true},{"title":"100 lb\/in","offer_id":50688784236802,"sku":"EIBPR1800.500.0100","price":151.99,"currency_code":"USD","in_stock":true},{"title":"125 lb\/in","offer_id":50688784269570,"sku":"EIBPR1800.500.0125","price":151.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/5271\/4754\/files\/eibach-spring-rear-18in-x-5in-x-125-lbsin-platinum-9136380.jpg?v=1759388663","url":"https:\/\/fenixmotorsport.com\/products\/eibach-platinum-rear-spring-18in-x-5-0in-od","provider":"Fenix Motorsports LLC","version":"1.0","type":"link"}