Eibach 1000.250.0175 ERS Race Main Coilover Spring 2.5" ID 175 lb/in

The Eibach 1000.250.0175 is a precision-engineered race main spring designed for the ERS (Eibach Race Spring) double-spring system. This linear-rate coilover spring provides the foundation for creating a custom suspension setup that delivers optimal track performance through precise spring rate control and exceptional durability.

ERS Double-Spring System:

This main spring is part of Eibach's renowned ERS system, which combines main and tender springs to create a sophisticated two-stage spring rate. The system provides a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully closes. This main spring determines the final rate of the system, while tender springs (sold separately) control the initial rate. The result is a suspension that compensates for road irregularities while minimizing body roll, squat, and dive during hard cornering, acceleration, and braking.

Key Features:

• Linear-rate characteristic for predictable, consistent performance
• High spring travel (deflection) with high end loads at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Exceptional dynamic durability and component longevity
• Manufactured to precise tolerances for reliable performance
• Superior corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number, spring rate, and physical dimensions for easy identification
• Block resistance design prevents coil binding
• Compatible with over 700 different ERS components for nearly unlimited tuning combinations

The ERS system allows suspension engineers and enthusiasts to fine-tune their setup by selecting from various tender springs (linear or progressive-rate), helper springs to prevent spring unseating at full droop, and connecting plates to link main and tender springs. This modular approach delivers unmatched flexibility for dialing in the perfect suspension balance for any racing application.