Eibach 0800.225.0400 ERS 8 Inch Coil-Over Spring 2.25 ID Race Main Spring

The Eibach ERS (Eibach Race Spring) Main Spring is engineered to deliver precise suspension control for racing applications. This 8-inch coil-over spring with 2.25-inch inner diameter features a linear-rate characteristic that determines the final rate in Eibach's renowned double-spring system.

ERS Double-Spring System:

Eibach's ERS system utilizes a Main and Tender spring concept that provides optimal suspension tuning. The system delivers a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully closes. This precise balance ensures maximum tire contact while minimizing body roll, squat, and dive during cornering, acceleration, and braking.

Key Features:

• Linear-rate main spring for predictable suspension behavior
• Compatible with over 700 ERS components for unlimited tuning combinations
• High spring travel and deflection for maximum performance in compact mounting lengths
• Shot-peened surface treatment for enhanced durability
• Phosphate and epoxy coating for superior corrosion protection
• Precise manufacturing tolerances for consistent performance
• Part number imprinted on spring indicating rate and dimensions
• Exceptional dynamic durability for extended component life

This main spring works seamlessly with Eibach Tender springs, Helper springs, and Connecting Plates to create a fully customizable suspension system. Whether you're a professional suspension engineer or weekend racer, the ERS system provides the flexibility and performance needed to optimize your vehicle's handling characteristics.