Eibach 1400.250.0300 ERS Race Main Coilover Spring 14" x 2.5" x 300 lb/in

The Eibach 1400.250.0300 is a high-performance race main spring designed for the ERS (Eibach Race Spring) system. This precision-engineered coilover spring measures 14 inches in length with a 2.5-inch diameter and delivers a 300 lb/in spring rate, providing the foundation for professional suspension tuning in racing and high-performance applications.

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 main spring provides a linear-rate characteristic that determines the final rate of the system. When paired with a tender spring, the system delivers a softer initial rate during combined compression, then transitions to the firmer main spring rate once the tender spring fully compresses. This versatility allows suspension engineers to fine-tune handling characteristics for optimal cornering, acceleration, and braking performance.

Key Features:

• Linear-rate main spring with 300 lb/in spring rate for consistent, predictable performance
• 14-inch length with 2.5-inch diameter for compatibility with racing coilover systems
• Shot-peened surface treatment for enhanced fatigue resistance and durability
• High spring travel capacity delivers maximum deflection at short mounting lengths
• Manufactured to precise tolerances for consistent performance
• Premium corrosion protection through phosphating and epoxy coating
• Clearly imprinted with part number indicating spring rate and physical dimensions
• Compatible with Eibach connecting plates for tender spring combinations
• Individual protective packaging to prevent shipping damage

The ERS system offers over 700 different spring components that can be combined to create nearly unlimited suspension configurations. Whether you're a professional race team or performance enthusiast, this main spring provides the precision and reliability demanded by motorsports applications.