Eibach 0700.225.0900 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) Race Main Spring is a precision-engineered coilover spring designed for racing and high-performance suspension tuning. This linear-rate main spring forms the foundation of Eibach's renowned double-spring system, providing the muscle needed to transform engine power into optimal track adhesion through precisely tuned suspension characteristics.

ERS Double-Spring System:

The ERS system uses a Main and Tender spring concept that delivers a softer initial rate when both springs compress together, then transitions to the desired firmer ending rate once the tender spring fully closes. The Main spring's linear-rate characteristic determines the final rate of the complete system, while Tender springs control initial rate characteristics. With over 700 different spring components available, the ERS system offers nearly unlimited combination possibilities for suspension engineers and enthusiasts.

Key Features:

• Linear-rate characteristic for predictable, consistent performance
• High spring travel and deflection capability with 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
• Block resistance design prevents coil binding
• Advanced corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number indicating spring rate and physical dimensions
• Individual protective packaging to prevent damage

This Main spring is designed to work with Eibach Tender springs (for dual-rate suspension tuning) or Helper springs (to prevent spring unseating at full droop). Connecting plates are available separately to join Main and Tender springs. Compatible with coilover shock absorbers for racing applications where precise suspension control is critical.