Eibach 0900.225.0550 ERS Race Main Coilover Spring

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

Key Features:

• Linear-rate characteristic that determines final suspension rate in ERS double-spring systems
• High spring travel and deflection capability for maximum load capacity at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior corrosion protection through phosphating and epoxy coating
• Precision manufacturing with tight tolerances for consistent performance
• Imprinted with part number indicating spring rate and physical dimensions for easy identification
• Block resistance design prevents coil binding
• Compatible with Eibach Tender springs for custom initial rate tuning

ERS System Design:

The ERS double-spring system combines Main and Tender springs to create a progressive suspension characteristic. When compressed together, both springs provide a softer initial rate for improved compliance over road irregularities. Once the Tender spring fully compresses, the Main spring alone determines the firmer ending rate, reducing body roll, squat, and dive during aggressive driving. This system offers over 700 different spring components that can be combined for virtually unlimited tuning possibilities.

Professional-Grade Construction:

Manufactured to exacting specifications, this racing spring delivers high dynamic durability and extended component longevity. Each spring undergoes rigorous quality control and arrives in individual protective packaging, ready for professional racing applications or dedicated weekend track enthusiasts seeking maximum suspension performance and flexibility.