SKU: 1200.250.0900S | UPC: 803050289070
Eibach ERS 12.00 in. Length x 2.50 in. ID Coil-Over Spring – 900 lbs/in Rate
The Eibach ERS 1200.250.0900S is a high-performance single coil-over spring from the legendary Eibach Race Spring (ERS) series, engineered for precise suspension tuning in racing, track, or high-performance street applications. With a 12.00″ length, 2.50″ inner diameter, 900 lbs/in linear rate, and 5.60″ of travel, this spring delivers the ideal balance of compliance and control. It provides the muscle to transfer engine power to the track through optimal tire contact, while compensating for road irregularities and minimizing body roll, squat, and dive during cornering, acceleration, and braking. Shot-peened, phosphated, and epoxy-coated for maximum durability, corrosion resistance, and longevity under extreme loads. Flat-ground ends ensure precise seating and even load distribution. Perfect for custom coil-over setups, double-spring systems (with tender/helper), or standalone use in motorsports, drifting, autocross, or tuned street builds where tunability and performance are critical.
Key Features & Benefits
- 900 lbs/in Linear Rate Firm control for reduced body motion with excellent compliance
- 12.00″ Length x 2.50″ ID Versatile sizing for most coil-over shocks and struts
- 5.60″ Travel / 6.40″ Block Height High deflection capability with 5,041 lbs load at block
- Shot-Peened & Epoxy-Coated Superior fatigue life, corrosion protection, and dynamic durability
- Flat-Ground Ends Precise fitment and even load distribution for consistent performance
| Specification | Detail |
|---|---|
| Part Number | 1200.250.0900S |
| Brand | Eibach ERS (Race Springs) |
| Application | Custom coil-over / racing / performance suspension tuning |
| Material | High-tensile spring steel, shot-peened, phosphated, epoxy-coated |
| Included | Single coil-over spring (imprinted with part no., rate, and dimensions) |
| Installation | Direct fit into coil-over assemblies; flat-ground ends for easy setup |
| Warranty | Eibach Limited Lifetime Warranty (typical for ERS series) |
Whats Included
- One 1200.250.0900S Eibach ERS coil-over spring 12.00″ length, 2.50″ ID, 900 lbs/in rate
Product Notes
- Linear rate for predictable handling; ideal for main spring in double-spring setups
- High block resistance and precise tolerances for consistent performance under load
- Surface treatments (shot-peening, phosphating, epoxy) maximize longevity and fatigue resistance
- Individual protective packaging and easy identification via imprint
- Part of Eibach’s modular ERS system combine with tender/helper springs for progressive rates
Installation Notes
- Estimated time: 30-90 minutes (depending on full suspension setup)
- Disassemble coil-over assembly, remove old spring
- Install new ERS spring with proper perch/seat alignment (flat-ground ends)
- Reassemble, set preload/ride height, torque to spec, and align suspension
- Professional installation and corner balancing recommended for optimal tuning
This Part Fits
| Year Range | Make | Model | Engine | Notes |
|---|---|---|---|---|
| Universal | Universal | Universal | Universal | Custom coil-over applications; 2.50″ ID fits most standard coil-over shocks/struts – verify shock compatibility and rate needs |
Why Choose Eibach ERS Coil-Over Spring?
- World-famous precision and tunability over 700 components for unlimited combinations
- High-performance linear rate with exceptional travel and load capacity
- Premium treatments for unmatched durability and corrosion resistance
- Eibach trusted leader in motorsports and performance suspension since 1980
Frequently Asked Questions
- Q: Is this spring linear or progressive?
A: Linear rate (900 lbs/in) provides consistent, predictable handling throughout compression. - Q: Can I use this in a double-spring setup?
A: Yes, ideal as main spring, pair with Eibach tender/helper for progressive characteristics. - Q: How do I choose the right rate?
A: Depends on vehicle weight, shock valving, and desired handling consult Eibach or suspension tuner for optimal setup.
Shipping and Handling
- Method: UPS / FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure protective packaging
- Weight: Approx. 8-12 lbs (single high-rate spring)
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