Eibach 0800.225.0650 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) Race Main Spring is a precision-engineered coilover spring component designed for serious racers and performance enthusiasts who demand the ultimate in suspension tuning flexibility. This high-quality linear-rate main spring serves as the foundation of Eibach's renowned double-spring system, transforming engine power into optimal track adhesion through scientifically balanced suspension dynamics.

ERS Double-Spring System Technology:

This main spring is part of Eibach's legendary ERS system, which offers over 700 different spring components that can be combined to create nearly unlimited suspension setups. The system uses a Main and Tender spring concept that delivers a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully closes. This sophisticated approach provides the perfect balance between compensating for road irregularities while minimizing body roll, squat, and dive during aggressive driving.

Key Performance Features:

• Linear-rate characteristic that determines the final rate of your suspension system
• Exceptional spring travel and high end loads despite short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability ensuring long component life under racing conditions
• Manufactured to precise tolerances for consistent, predictable performance
• Premium corrosion protection through phosphating and epoxy coating
• Block resistance design prevents coil binding
• Clearly imprinted with part number indicating spring rate and physical dimensions for easy identification

System Compatibility:

This main spring works seamlessly with Eibach Tender springs (available in linear and progressive rates), Helper springs (for preventing spring looseness at full droop), and Connecting Plates (for joining main and tender springs). The modular design allows suspension engineers and weekend racers alike to fine-tune their setup with precision, creating custom spring combinations from readily available stock components.

Each spring arrives in individual protective packaging and is backed by Eibach's reputation for world-class racing components used in professional motorsports worldwide.