Eibach 1200.250.0225 ERS Race Main Coilover Spring

The Eibach 1200.250.0225 is a precision-engineered Race Main Spring designed for the Eibach Race Spring System (ERS). This high-performance coilover spring provides the foundation for optimum suspension tuning, transforming engine power into track adhesion through precise spring rate control.

ERS Double Spring System:

This Main spring is part of Eibach's renowned ERS double-spring system, which allows suspension engineers and enthusiasts to create nearly unlimited spring combinations from over 700 different components. The system uses a Main and Tender spring concept that delivers a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully closes. The linear-rate Main spring determines the final system rate and overall suspension characteristics.

Key Features:

• Linear-rate spring characteristic for predictable performance
• High spring travel and deflection capability at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability for extended component longevity
• Manufactured to precise tolerances for consistent performance
• Phosphate and epoxy coating for excellent corrosion protection
• Part number imprinted on spring indicating rate and dimensions
• Compatible with Eibach Tender springs, Helper springs, and Connecting Plates

Designed for racing applications where suspension tuning precision is critical, this Main spring balances the need for compliance over road irregularities while maintaining firm control to reduce body roll, squat, and dive during cornering, acceleration, and braking.