Eibach Platinum Rear Coil Springs – 5.00in OD x 18.00in Length – Premium Ultra-High Tensile Steel Performance

The Eibach Platinum Series Rear Coil Springs (5.00in OD x 18.00in Length) 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 50 lb/in, 75 lb/in, and 100 lb/in rates, they provide tailored performance for every build — from race-prepped vehicles to precision street applications.

Whether 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.

Engineered for Maximum Travel and Strength

Every Eibach Platinum Spring 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.

Engineering Highlights:

• Ultra-Lightweight Construction: Reduces unsprung mass for faster suspension response.

• More Travel / Less Deflection: Maximizes suspension articulation under compression and rebound.

• Block Resistant: No rate loss or coil bind, even at full compression.

• Consistent Rate Control: Maintains exact load characteristics through repeated cycles.

• Precision Wound Ends: Flat-ground configuration ensures perfect seat contact and load distribution.

Each spring is engineered to meet ±1% rate tolerance — a precision level far beyond typical OEM or aftermarket standards.

Built for Professional-Level Suspension Systems

The Eibach 5.00” OD x 18.00” Length Platinum Rear Coil Spring is ideal for applications requiring balanced load distribution, predictable rate response, and consistent performance across varied terrains or track conditions.

Perfect for:

• Off-Road Racing & Desert Trucks: Handles massive travel ranges and variable loads under high-speed terrain.

• Track & Circuit Cars: Provides stable compression characteristics for corner balance and predictable weight transfer.

• UTV & SXS Performance: Lightweight and precise for long-travel coilover systems.

• Custom Fabrication Projects: Seamlessly integrates with coilover conversions, chassis builds, and race-spec suspensions.

The 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.

Technical Specifications

Each 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.

The Eibach Advantage: Race-Proven Technology

Eibach’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.

Manufacturing Highlights:

• Shot-peened surface for improved fatigue strength

• Heat-treated for dimensional stability

• Pre-set multiple times to eliminate settling

• Powder-coated for corrosion resistance and professional finish

These quality measures ensure that every Platinum Series spring performs consistently under extreme temperatures, vibration, and continuous load — even after years of use.

Consistent Performance Under Extreme Conditions

Eibach’s Platinum Series 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.

Performance Benefits:

• Maintains spring height and rate under extended use

• Linear load curve for predictable handling

• Excellent fatigue resistance for long-term reliability

• Minimal rate deviation across repeated cycles

Every Eibach spring is manufactured under ISO 9001-certified conditions and tested to precise standards for compression, rebound, and temperature stability.

Tailored Rate Options for Custom Suspension Tuning

With three available rates — 50 lb/in, 75 lb/in, and 100 lb/in — builders can fine-tune suspension behavior for their exact performance goals.

• 50 lb/in: Ideal for lightweight vehicles or applications requiring high travel and soft damping response.

• 75 lb/in: Balanced option for street performance, track cars, or moderate off-road use.

• 100 lb/in: Best suited for heavier vehicles or builds requiring higher resistance to bottoming out under load.

These variants provide flexibility to achieve the perfect balance of control, comfort, and responsiveness in any configuration.

Application Examples

• Desert Racing Trucks & Pre-Runners: Delivers consistent spring control through long-travel, high-speed terrain.

• UTV Coilover Conversions: Reduces unsprung weight while maintaining preload precision.

• Track Cars & Drift Builds: Provides linear handling characteristics and stable corner balance.

• Street Performance & Custom Fabrication: Offers race-grade precision for everyday reliability.

No matter the environment, Eibach springs maintain their performance characteristics, helping drivers and builders achieve repeatable, measurable gains in both comfort and control.

Eibach: Precision Engineering for Performance Builders

For over 70 years, Eibach 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.

• Designed, tested, and manufactured to exacting German and U.S. standards

• Used by leading race teams and off-road manufacturers worldwide

• Backed by Eibach’s reputation for durability, precision, and innovation

When you choose Eibach, you’re investing in proven performance that translates directly into better handling, more confidence, and more control.

Why Buy from Fenix Motorsports

At Fenix Motorsports, 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.

When you buy from Fenix, you get:

• Genuine, race-proven Eibach components

• Expert, enthusiast-backed technical support

• Fast U.S. shipping and easy returns

• Access to premium performance brands like Eibach, FOX, KING, Rigid Industries, Baja Designs, and NRG Innovations

We don’t just sell suspension components — we rely on them. Whether you’re fabricating your dream build or chasing a podium, Fenix Motorsports delivers the reliability and performance you can count on.

Why Fenix? Because precision is power.