Eibach 0500.225.0700 ERS Race Main Coilover Spring

The Eibach 0500.225.0700 is a high-performance race main spring designed for use in the company's renowned ERS (Eibach Race Spring) double-spring coilover system. This precision-engineered component delivers the optimal balance between comfort and performance, providing the muscle needed to transform engine power into track adhesion through superior suspension tuning.

ERS Double-Spring System:

This main spring is part of Eibach's innovative dual-spring concept, which combines a main spring with a tender spring to create a progressive-rate system. The main spring features a linear-rate characteristic and determines the final spring rate of the complete system. When both springs compress together, they provide a softer initial rate for improved compliance over surface irregularities. Once the tender spring fully compresses, the main spring alone delivers the firmer ending rate needed to control body roll, squat, and dive during aggressive driving.

Key Features:

• Linear-rate main spring design for predictable suspension characteristics
• Compatible with over 700 ERS components for unlimited tuning combinations
• High spring travel and deflection capability at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability for extended component longevity
• 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
• Works with Eibach connecting plates for main/tender spring integration

Ideal for motorsport applications and serious track enthusiasts, this ERS main spring enables suspension engineers and weekend racers alike to fine-tune their setup for maximum performance. The modular design allows for quick spring changes to adapt to different track conditions, vehicle weights, or driving styles.