Eibach 1200.250.0300 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) Main Spring is a precision-engineered linear-rate coilover spring designed for racing and high-performance suspension systems. This spring serves as the foundation of Eibach's renowned double-spring system, providing the muscle needed to transfer engine power to the track through optimum tire adhesion.

ERS Double-Spring System:

This Main spring is part of Eibach's modular ERS system, which allows suspension tuners to create nearly unlimited combinations from over 700 different spring components. The system uses a Main and Tender spring concept that provides a softer initial rate when both springs compress together, then delivers a firmer ending rate once the tender spring fully closes. The Main spring determines the final rate of the complete system with its linear-rate characteristic.

Key Features:

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

This race-quality Main spring is designed for use with coilover shock absorbers and is ideal for circuit racing, time attack, autocross, and other motorsport applications where precise suspension tuning is critical.