Eibach 0900.225.0400 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) main coilover spring is engineered for precise suspension tuning in racing and high-performance applications. This linear-rate spring serves as the foundation of Eibach's renowned double-spring system, providing the final spring rate that determines your vehicle's suspension characteristics during cornering, acceleration, and braking.

ERS Double-Spring System:

The ERS system uses a Main and Tender spring configuration to deliver optimal suspension performance. When both springs compress together, the system provides a softer initial rate for better road contact and compliance. Once the tender spring fully closes, the main spring's firmer rate takes over, reducing body roll, squat, and dive. This race-proven design allows suspension engineers and enthusiasts to create nearly unlimited spring combinations from over 700 different components.

Key Features:

• Linear-rate characteristic determines final system spring rate
• High spring travel and deflection for maximum end loads at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Precision manufacturing with tight tolerances for consistent performance
• Superior corrosion protection through phosphating and epoxy coating
• Block resistance design prevents coil bind
• Part number imprinted on spring indicates spring rate and physical dimensions
• Compatible with Eibach connecting plates for tender spring integration
• Individually packaged for protection during shipping and storage

Designed for use with Eibach tender springs, helper springs, and connecting plates to create custom-tuned coilover systems. Can also be used as a standalone main spring in racing applications requiring precise spring rate control.