Eibach 1000.250.0250 ERS Race Main Coilover Spring 2.5" ID x 10" Length

The Eibach ERS (Eibach Race Spring) Main Spring is a precision-engineered linear-rate coilover spring designed for racing and high-performance suspension systems. This race-grade spring provides the foundation for proper suspension tuning, delivering the optimal balance between compliance and control needed to maximize tire contact and vehicle dynamics on track.

ERS Double-Spring System:

This Main spring is part of Eibach's renowned ERS double-spring system, which combines Main and Tender springs to create a progressive suspension response. The system provides a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the Tender spring fully closes. With over 700 different spring components available, the ERS system offers nearly unlimited combination possibilities for precise suspension tuning. The Main spring's linear-rate characteristic determines the final rate of the complete system.

Key Features:

• Linear-rate race spring compatible with Helper and Tender springs for custom suspension tuning
• High spring travel and deflection capability with short mounting lengths for maximum design flexibility
• Shot-peened surface treatment for superior fatigue resistance and extended service life
• Precision manufacturing with tight tolerances for consistent performance
• Advanced corrosion protection through phosphating and durable epoxy coating
• Clearly imprinted with part number indicating spring rate and physical dimensions for easy identification
• Individual protective packaging to prevent damage during storage and shipping
• Block resistance design prevents coil binding under maximum compression

Eibach ERS springs are engineered to reduce body roll, squat, and dive during cornering, acceleration, and braking while maintaining enough compliance to compensate for track irregularities. Compatible with Eibach Connecting Plates for Main/Tender spring combinations and Helper springs to prevent spring unseating at full droop extension.