Eibach 0900.225.0300 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) Main Spring is a precision-engineered coilover spring designed for racing applications and high-performance suspension tuning. This linear-rate spring serves as the foundation of Eibach's renowned double-spring system, which allows suspension engineers and enthusiasts to fine-tune their vehicle's handling characteristics through strategic spring combinations.

ERS Double-Spring System:

The ERS system utilizes a Main and Tender spring configuration that delivers progressive suspension behavior. When both springs compress together, the system provides a softer initial rate for improved compliance over road irregularities. Once the tender spring fully compresses, the Main spring's firmer rate takes over, reducing body roll, squat, and dive during cornering, acceleration, and braking. This Main spring determines the final rate of the complete system.

Key Features:

• Linear-rate characteristic for consistent, predictable performance
• Compatible with over 700 ERS spring components for unlimited tuning combinations
• High spring travel and deflection capacity at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability ensures extended component longevity
• Manufactured to precise tolerances for consistent performance
• Advanced corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number indicating spring rate and physical dimensions
• Block resistance prevents coil binding under maximum compression

Part of Eibach's comprehensive ERS lineup, this Main spring works in conjunction with Tender springs, Helper springs, and connecting plates to create a fully customizable suspension solution optimized for track conditions and driving style.