Eibach 0700.250.0450 ERS Race Main Coilover Spring

The Eibach ERS (Eibach Race Spring) system represents precision-engineered suspension tuning for racing and performance applications. This race main spring is a critical component in Eibach's renowned double-spring system, designed to transform engine power into optimal track adhesion through carefully balanced suspension dynamics.

ERS Double-Spring System:

The ERS system utilizes a Main and Tender spring concept that delivers exceptional versatility. 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 provides a softer initial rate as both springs compress together, then transitions to the desired firmer ending rate once the tender spring fully closes. With over 700 different single spring components available, the ERS system offers nearly unlimited combination possibilities for precise suspension tuning.

Key Features:

• Linear-rate race main spring for ERS double-spring applications
• High spring travel and deflection capacity for maximum end loads at short mounting lengths
• Shot-peened surface treatment for superior fatigue resistance
• High dynamic durability ensuring extended component longevity
• Manufactured to precise tolerances for consistent performance
• Advanced corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number indicating spring rate and physical dimensions
• Compatible with Eibach Connecting Plates for Main/Tender spring configurations
• Block resistance design
• Individual protective packaging

This main spring works in conjunction with Eibach Tender springs and Helper springs to create a complete, tunable suspension system. Helper springs prevent the main spring from becoming loose at full droop, while Tender springs determine the initial system rate. The result is a precisely balanced suspension that maintains road contact while minimizing body roll, squat, and dive during aggressive driving.