Eibach 0800.225.1000 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 applications. Part of Eibach's renowned double-spring system, this component delivers the precise spring characteristics needed to transform engine power into optimal track adhesion through carefully balanced suspension tuning.

ERS Double-Spring System Design:

This Main spring works within Eibach's ERS double-spring concept, which combines Main and Tender springs to create a sophisticated two-stage rate system. The Main spring determines the final rate of the suspension system and features a consistent linear-rate characteristic throughout its compression range. When paired with a Tender spring, the system provides a softer initial rate during combined compression, then transitions to the firmer Main spring rate once the Tender spring fully compresses—delivering both compliance over road irregularities and firm control during hard cornering, acceleration, and braking.

Key Performance Features:

• Linear-rate spring characteristic for predictable suspension behavior
• Compatible with over 700 ERS spring components for virtually unlimited tuning combinations
• High spring travel and deflection capability at short mounting lengths
• Shot-peened surface treatment for superior fatigue resistance
• High dynamic durability for extended component life under racing conditions
• Manufactured to precise tolerances for consistent performance
• Advanced corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number indicating spring rate and physical dimensions
• Block resistance design prevents coil binding

System Compatibility:

Works with Eibach Tender springs to create custom dual-rate systems, Helper springs to prevent spring separation at full droop (up to 50mm gap), and Connecting Plates for secure Main-Tender spring assembly. Suitable for use with threaded-body coilover dampers and racing suspension applications requiring precise spring rate control.