Eibach 0500.225.1400 ERS Race Main Coilover Spring

The Eibach 0500.225.1400 is a precision-engineered race main spring designed for the company's renowned ERS (Eibach Race Spring) double-spring system. This high-performance coilover spring provides the foundation for optimizing suspension tuning, delivering the perfect balance between road compliance and chassis control during aggressive driving.

ERS Double-Spring System Technology:

This main spring works as part of Eibach's innovative ERS system, which combines main and tender springs to create a dual-rate suspension setup. The system provides a softer initial rate when both springs compress together, then transitions to a firmer final rate once the tender spring fully compresses. With over 700 different spring components available, the ERS system offers nearly unlimited tuning combinations for suspension engineers and enthusiasts alike.

Key Features:

• Linear-rate main spring that determines the final rate of the suspension system
• Shot-peened surface treatment for enhanced fatigue resistance
• High spring travel and deflection capability at compact mounting lengths
• Superior block resistance for consistent performance
• Exceptional dynamic durability for extended component life
• Manufactured to precise tolerances for predictable performance
• Advanced corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number indicating spring rate and physical dimensions
• Compatible with Eibach connecting plates for main/tender spring combinations

This main spring is designed to work with Eibach tender springs (for adjustable dual-rate tuning) or helper springs (to prevent spring looseness at full droop). The result is a suspension system that maintains optimal tire contact while minimizing body roll, squat, and dive during cornering, acceleration, and braking.