Eibach 0800.250.0425 ERS Race Main Coilover Spring

The Eibach 0800.250.0425 is a high-performance race main spring designed for use in Eibach's renowned ERS (Eibach Race Spring) double-spring system. This precision-engineered coilover spring provides the foundation for optimizing suspension performance by transferring engine power to the track through superior adhesion and control.

ERS Double-Spring System:

This main spring works as part of Eibach's innovative dual-spring concept, which combines main and tender springs to deliver exceptional tuning flexibility. 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. With over 700 different spring components available, the ERS system enables nearly unlimited suspension tuning combinations for professional race teams and enthusiasts alike.

Key Features:

• Linear-rate characteristic that determines the final rate of the suspension system
• Shot-peened surface treatment for enhanced fatigue resistance
• High spring travel and deflection capability with short mounting lengths
• Superior block resistance for consistent performance under load
• Precision manufacturing with tight tolerances for predictable behavior
• Advanced corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number indicating spring rate and physical dimensions
• Exceptional dynamic durability for extended component life

The main spring is designed to work with Eibach tender springs to fine-tune initial suspension rates, and can accommodate helper springs to prevent spring looseness at full droop. Eibach connecting plates (available in inside and outside diameter configurations) facilitate proper spring assembly on various damper types.