Eibach 0600.225.0350 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) Main Spring is a precision-engineered coilover spring designed for racing and high-performance suspension applications. This linear-rate spring serves as the foundation of Eibach's renowned double-spring system, providing the final spring rate that determines suspension behavior under load.

ERS Double-Spring System:

The ERS system uses a Main and Tender spring combination to deliver optimal suspension tuning. The Main spring provides a linear-rate characteristic and determines the final rate once the tender spring fully compresses. This configuration allows for a softer initial rate when both springs compress together, then transitions to a firmer ending rate for improved body control during cornering, acceleration, and braking. With over 700 different spring components available, the ERS system offers nearly unlimited tuning combinations for professional engineers and enthusiasts alike.

Key Features:

• Linear-rate main spring for predictable suspension response
• Shot-peened surface treatment for enhanced fatigue resistance
• High spring travel (deflection) with excellent end loads at short mounting lengths
• Block resistance for bottoming protection
• Superior corrosion protection through phosphating and epoxy coating
• Precise manufacturing tolerances for consistent performance
• High dynamic durability for extended component life
• Clearly imprinted with part number, spring rate, and physical dimensions for easy identification
• Individual protective packaging to prevent damage
• Compatible with Eibach Helper and Tender springs for complete system tuning

This main spring works with Eibach Connecting Plates (sold separately) to attach tender springs when building a complete ERS double-spring system. The modular design allows suspension tuners to fine-tune spring rates and characteristics by selecting different tender spring combinations while maintaining the same main spring foundation.