Eibach 1400.250.0120 ERS Race Main Coilover Spring

The Eibach 1400.250.0120 is a high-performance race main spring designed for the ERS (Eibach Race Spring) system. This precision-engineered coilover spring provides the foundation for optimum suspension tuning, delivering the muscle needed to transfer engine power to the track through maximum tire adhesion.

ERS Double Spring System:

This main spring is part of Eibach's renowned ERS double-spring 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 compresses. With over 700 different components available, the ERS system offers nearly unlimited combination possibilities for precise suspension tuning.

Key Features:

• Linear-rate main spring determines the final spring rate of the system
• High spring travel and deflection capability at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability for extended component longevity
• Manufactured to precise tolerances for consistent performance
• Advanced corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number, spring rate, and physical dimensions
• Block resistance design prevents coil binding

This race main spring works in conjunction with Eibach tender springs and connecting plates to create a fully adjustable suspension system. Compatible with helper springs to prevent spring looseness at full droop (up to 50mm gap coverage). Ideal for racing applications, track-focused builds, and serious enthusiasts demanding professional-grade suspension components.