Eibach 0500.225.0550 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) system delivers the precise suspension tuning needed to maximize traction and vehicle control on the track. This race main spring is a key component in Eibach's renowned double-spring system, which allows suspension engineers and enthusiasts to create nearly unlimited spring combinations from over 700 individual components.

ERS Double-Spring System:

The ERS system uses a Main and Tender spring concept that provides exceptional tuning flexibility. The Main spring features a linear-rate characteristic and determines the final rate of the suspension system. When combined with a Tender spring, the system delivers a softer initial rate as both springs compress together, then transitions to a firmer ending rate once the tender spring fully closes. This progressive behavior optimizes suspension response across varying track conditions.

Key Features:

• Linear-rate main spring for predictable, consistent performance
• High spring travel and deflection for maximum end loads at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• High dynamic durability ensures long component life under racing conditions
• Manufactured to precise tolerances for consistent performance
• Superior corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number indicating spring rate and physical dimensions
• Compatible with Eibach Helper springs and Connecting Plates for complete system customization

Each spring is individually packaged for protection and easy identification. The ERS system's modular design allows you to fine-tune your suspension setup for specific track conditions, vehicle weight distribution, and driving style—delivering the optimal balance between compliance and control.