Eibach 0800.250.0375 ERS Race Main Coilover Spring 2.5" ID

The Eibach 0800.250.0375 is a precision-engineered race main spring designed for high-performance suspension tuning. This coilover spring is part of Eibach's renowned ERS (Eibach Race Spring) system, which provides racers and enthusiasts with the flexibility to create custom spring combinations for optimal track performance.

ERS Double Spring System:

The ERS system utilizes a sophisticated Main and Tender spring concept that delivers dual-rate characteristics. When both springs compress together, the system provides a softer initial rate for improved compliance over road irregularities. Once the tender spring fully compresses, the main spring takes over with a firmer rate for reduced body roll, squat, and dive during aggressive driving. This main spring features a linear-rate characteristic and determines the final spring rate of your suspension setup.

Key Features:

• Linear-rate main spring for predictable, consistent performance
• Compatible with over 700 ERS components for unlimited setup possibilities
• High spring travel (deflection) with short mounting lengths for packaging flexibility
• Shot-peened surface treatment for enhanced fatigue resistance
• Exceptional dynamic durability for extended service life
• Manufactured to precise tolerances for consistent performance
• Phosphate and epoxy coating for superior corrosion protection
• Part number imprinted on spring indicating rate and physical dimensions
• Works with ERS tender springs, helper springs, and connecting plates

This main spring can be paired with various tender springs (linear or progressive-rate) to fine-tune initial suspension characteristics, or used with helper springs to prevent spring unseating at full droop. Connecting plates enable secure integration of main and tender springs in your custom suspension configuration.