Eibach 0800.225.0500 ERS Race Main Coilover Spring

The Eibach 0800.225.0500 is a precision-engineered race main spring designed for use in Eibach's renowned ERS (Eibach Race Spring) double-spring system. This high-performance coilover spring transforms engine power into optimal track adhesion by providing the perfect balance between compliance and control.

ERS Double-Spring System:

This main spring works as part of Eibach's innovative ERS double-spring configuration, which combines a main spring with a tender spring to deliver progressive spring rate characteristics. The system provides a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully compresses. The main spring features a linear-rate characteristic that determines the final spring rate of the complete system.

Key Features:

• Linear-rate main spring for precise suspension tuning and predictable handling
• Compatible with over 700 different ERS spring components for nearly unlimited custom combinations
• High spring travel and deflection capacity with exceptional end loads at short mounting lengths
• Shot-peened surface treatment for superior fatigue resistance and extended service life
• Advanced corrosion protection through phosphating and epoxy coating
• Precision manufacturing with tight tolerances for consistent performance
• Block resistance design prevents coil binding under extreme compression
• Clearly imprinted with part number indicating spring rate and physical dimensions
• Individually packaged for protection during storage and shipping

Designed for serious racers and performance enthusiasts, this ERS main spring enables fine-tuned suspension setup to reduce body roll, squat, and dive while maintaining optimal tire contact through corners, under acceleration, and during braking. The spring works with Eibach connecting plates (sold separately) to attach tender springs for complete suspension customization.