Eibach 1400.250.0275 ERS Race Main Coilover Spring 14" x 2.5" ID x 275 lb/in

The Eibach 1400.250.0275 is a high-performance race main spring designed for the ERS (Eibach Race Spring) modular coilover system. This precision-engineered linear-rate spring measures 14 inches in length with a 2.5-inch inner diameter and delivers a spring rate of 275 lb/in, providing the foundation for a properly tuned suspension system that transforms engine power into optimal track adhesion.

ERS Double-Spring System Design:

This main spring is part of Eibach's renowned ERS double-spring system, which combines main and tender springs to achieve superior suspension tuning. The system provides a softer initial rate when both springs compress together, then transitions to the firmer main spring rate once the tender spring fully closes. This dual-rate behavior allows precise control over body roll, squat, and dive during cornering, acceleration, and braking while maintaining compliance over road irregularities.

Key Features:

• Linear-rate main spring design determines the final system rate
• Compatible with over 700 ERS components for unlimited suspension combinations
• High spring travel and deflection capacity with short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Premium corrosion protection through phosphating and epoxy coating
• Manufactured to precise tolerances for consistent performance
• Block resistance design prevents coil bind
• Part number imprinted directly on spring for easy identification
• High dynamic durability for extended component life
• Individually packaged for protection

Application Notes:

This main spring is designed to work with Eibach tender springs (linear or progressive-rate), helper springs, and connecting plates to create a customized suspension solution. The modular ERS system allows suspension engineers and enthusiasts to fine-tune spring rates and characteristics for specific vehicle applications and racing conditions.