Eibach 1000.250.0225 ERS Race Main Coilover Spring 10 inch x 2.5 inch ID

The Eibach 1000.250.0225 is a precision-engineered Race Main Spring designed for the ERS (Eibach Race Spring) double-spring system. This linear-rate coilover spring provides the foundation for achieving optimum suspension balance in racing and high-performance applications, transforming engine power to the track through maximum tire adhesion.

ERS Double-Spring System:

This Main spring is part of Eibach's renowned ERS system, which combines Main and Tender springs to create a dual-rate suspension setup. The system delivers a softer initial rate when both springs compress together, then transitions to the firmer Main spring rate once the Tender spring fully compresses. With over 700 different spring components available, the ERS system offers nearly unlimited combination possibilities for precise suspension tuning.

Key Features:

• Linear-rate characteristic determines the final rate of the suspension system
• High spring travel (deflection) delivers high end loads at short mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior dynamic durability for extended component longevity
• Manufactured to precise tolerances for consistent performance
• Premium corrosion protection through phosphating and epoxy coating
• Part number imprinted on spring indicating spring rate and physical dimensions
• Block resistance design prevents coil binding
• Compatible with Eibach Tender springs and Connecting Plates for complete system setup

This Race Main Spring is designed to work with Eibach Helper springs (to prevent looseness at full droop) and Tender springs (to control initial rate). Connecting Plates are available separately to join Main and Tender springs in the ERS configuration.