Eibach 0500.225.1100 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. This spring serves as the foundation of Eibach's renowned ERS double-spring system, which allows suspension engineers and enthusiasts to create custom spring rate combinations tailored to specific vehicle dynamics and track conditions.

ERS Double-Spring System:

The ERS system uses a Main and Tender spring concept to deliver optimal suspension performance. When both springs compress together, the system provides a softer initial rate for better compliance over road irregularities. Once the tender spring fully compresses, the Main spring's linear rate takes over, providing the firmer ending rate needed for controlling body roll, squat, and dive during aggressive driving. This Main spring determines the final rate of the complete system.

Key Features:

• Linear-rate characteristic for predictable, consistent suspension response
• High spring travel (deflection) with exceptional end loads at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability for extended component longevity
• Manufactured to precise tolerances for reliable performance
• Advanced corrosion protection through phosphating and epoxy coating
• Block resistance to prevent coil binding
• Clearly imprinted with part number indicating spring rate and physical dimensions

The ERS system offers over 700 different spring components that can be combined to create nearly unlimited suspension tuning possibilities. Main springs work with Tender springs (which determine initial rate), Helper springs (which prevent spring looseness at full droop), and Connecting Plates to create a complete custom suspension solution.