Eibach 0600.250.0900 ERS Race Main Coilover Spring 2.5" ID 9" Length

The Eibach 0600.250.0900 is a precision-engineered race main spring designed for the company's world-renowned ERS (Eibach Race Spring) double-spring system. This high-performance coilover spring provides the foundation for optimized suspension tuning, transforming engine power into track performance through superior adhesion and control.

ERS Double-Spring System:

This main spring works as part of Eibach's innovative dual-spring configuration, which combines a main spring with a tender or helper spring. The system delivers a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully closes. This linear-rate main spring determines the final spring rate of the complete system, allowing suspension engineers to fine-tune the balance between compliance over road irregularities and the firmness needed to control body roll, squat, and dive during aggressive driving.

Key Features:

• Part of the ERS system with over 700 spring components for nearly unlimited suspension combinations
• Linear-rate characteristic for predictable, consistent performance
• High spring travel (deflection) delivering elevated end loads at compact mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability ensuring extended component longevity
• Manufactured to precise tolerances for reliable performance
• Advanced corrosion protection through phosphating and epoxy coating
• Part number imprinted directly on spring indicating spring rate and physical dimensions for easy identification
• Block resistance design prevents coil binding

Compatible with Eibach connecting plates (inside and outside diameter options available) for integration with tender springs. This professional-grade spring is ideal for racing applications, track-day vehicles, and serious performance enthusiasts demanding the ultimate in suspension precision and adjustability.