Eibach 0500.225.0850 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) Race Main Spring is a precision-engineered coilover spring designed for racing and high-performance suspension applications. This main spring serves as the foundation of Eibach's renowned double-spring system, delivering the precise balance between compliance and control needed to maximize tire contact and vehicle dynamics on track.

ERS Double-Spring System Overview:

Eibach's ERS system uses a Main and Tender spring concept that provides optimal suspension tuning flexibility. The Main spring features a linear-rate characteristic and determines the final rate of the complete system. When combined with a Tender spring, the system delivers a softer initial rate as both springs compress together, then transitions to the firmer Main spring rate once the Tender spring fully coils. This progressive behavior allows suspension engineers to fine-tune the balance between road-holding compliance and body control during cornering, acceleration, and braking.

Key Features:

• Linear-rate main spring design for predictable suspension characteristics
• Compatible with over 700 ERS spring components for nearly unlimited tuning combinations
• High spring travel and deflection capacity at compact mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Precision manufacturing with tight tolerances for consistent performance
• Advanced corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number, spring rate, and physical dimensions for easy identification
• High dynamic durability ensures long component life under racing conditions
• Individual protective packaging to prevent damage during storage and shipping

This Main spring is designed to work with Eibach Tender springs (for dual-rate tuning), Helper springs (to prevent spring unseating at full droop), and Connecting Plates (to join Main and Tender springs). The system's modular design makes it ideal for professional race teams and serious enthusiasts who demand precise, repeatable suspension tuning.