Eibach 0900.225.0500 ERS Coilover Race Main Spring

The Eibach ERS (Eibach Race Spring) Main Spring is a precision-engineered coilover spring designed for racing and high-performance applications. This linear-rate spring serves as the foundation of Eibach's world-renowned double-spring system, delivering the precise suspension tuning needed to transform engine power into optimal track adhesion.

ERS Double-Spring System:

The ERS system combines Main and Tender springs to provide exceptional tuning flexibility. The Main spring determines the final rate of the system and works in conjunction with a Tender spring to create a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the Tender spring fully closes. This dual-rate characteristic allows engineers to fine-tune the balance between ride compliance and body control during cornering, acceleration, and braking.

Key Features:

• Linear-rate characteristic for predictable suspension behavior
• High spring travel and deflection capacity at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability for extended component life
• Precision manufacturing with tight tolerances
• Advanced corrosion protection via phosphating and epoxy coating
• Clearly imprinted with part number indicating spring rate and dimensions
• Compatible with over 700 ERS components for nearly unlimited tuning combinations
• Includes individual protective packaging

Eibach ERS springs are designed to work with connecting plates (available separately) that join Main and Tender springs, and with Helper springs to prevent spring separation at full droop. This modular system allows suspension engineers and enthusiasts to build precisely tailored spring setups for any racing application.