Eibach 1200.250.0175 ERS Race Main Coilover Spring 2.5" ID

The Eibach 1200.250.0175 is a precision-engineered race main spring designed for high-performance coilover suspension systems. This spring serves as the primary load-bearing component in Eibach's renowned ERS (Eibach Race Spring) double-spring system, delivering the precise suspension characteristics needed for competitive motorsports and track applications.

ERS Double-Spring System:

This main spring is part of Eibach's modular ERS system, which combines main and tender springs to create a sophisticated two-stage spring rate. The system provides a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully compresses. This main spring features a linear-rate characteristic that determines the final rate of the complete system, allowing suspension tuners to dial in precise handling characteristics for any track condition.

Key Features:

• Linear-rate main spring for predictable, consistent suspension response
• High spring travel and deflection capability at compact mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Precision tolerances for exact spring rate specifications
• Phosphate coating with epoxy finish for superior corrosion protection
• Part number imprinted directly on spring indicating rate and dimensions
• Compatible with Eibach tender springs, helper springs, and connecting plates
• Engineered for extreme dynamic durability in racing applications

The ERS system offers over 700 different spring components that can be combined to create virtually unlimited suspension configurations. Whether you're a professional race engineer or dedicated track enthusiast, this main spring provides the foundation for a perfectly balanced suspension system that maximizes tire contact, minimizes body roll, and optimizes weight transfer during acceleration, braking, and cornering.