Eibach 0700.250.0350 ERS Race Main Coilover Spring 2.5" ID x 3.5" Travel

The Eibach ERS (Eibach Race Spring) Race Main Spring is engineered to provide the precise suspension control needed to maximize traction and performance on the track. This linear-rate main spring serves as the foundation of Eibach's renowned double-spring system, delivering the firm ending rate required for aggressive cornering, acceleration, and braking.

ERS Double-Spring System:

The Eibach ERS system utilizes a Main and Tender spring concept that creates a dual-rate characteristic. When combined with a tender spring, the system provides a softer initial rate as both springs compress together, then transitions to the firmer main spring rate once the tender spring fully compresses. This configuration allows suspension engineers to fine-tune the balance between ride compliance and body control with nearly unlimited combinations from over 700 different spring components.

Key Features:

• Linear-rate characteristic determines the final rate of the suspension system
• Compatible with helper springs to prevent spring separation at full droop (up to 50mm gap coverage)
• High spring travel and deflection capability at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Precision-wound with tight tolerances for consistent performance
• Phosphate and epoxy coating provides superior corrosion protection
• Part number imprinted on spring indicates spring rate and physical dimensions for easy identification
• Exceptional dynamic durability for long component life under racing conditions

This main spring is designed to work with Eibach connecting plates (inside or outside diameter) when paired with tender springs, allowing for customized suspension tuning to meet specific vehicle and track requirements.