Eibach 0800.250.1200 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) Main Spring is a precision-engineered linear-rate coilover spring designed for racing and high-performance suspension applications. This spring serves as the foundation of Eibach's renowned double-spring system, providing the muscle needed to transform engine power into optimal track adhesion through precise suspension tuning.

ERS Double-Spring System:

This Main spring is part of Eibach's ERS system, which combines Main and Tender springs to create a progressive suspension setup. The system delivers a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully closes. The Main spring's linear-rate characteristic determines the final rate of the complete system, allowing suspension engineers to fine-tune the balance between compliance over road irregularities and control during cornering, acceleration, and braking.

Key Features:

• Linear-rate characteristic for predictable, consistent performance
• High spring travel and deflection capacity at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability for extended component life
• Precision manufacturing with tight tolerances
• Advanced corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number, spring rate, and physical dimensions for easy identification
• Compatible with over 700 ERS components for virtually unlimited tuning combinations

Designed for use with Eibach Tender springs, Helper springs, and Connecting Plates, this Main spring enables professional race teams and performance enthusiasts to build custom suspension systems tailored to specific vehicle requirements and track conditions.