Eibach 1200.250.0550S Coilover Spring ID Length lb/in - 2.5 5.5 550 Silver

The Eibach 1200.250.0550S is a precision-engineered coilover spring designed for racing and high-performance applications. With a 2.50" inner diameter, 5.5" free length, and 550 lb/in spring rate, this silver-finished spring delivers the precise suspension control needed to transfer engine power to the track through optimum tire adhesion.

ERS Double Spring System Compatibility:

This spring is part of Eibach's renowned ERS (Eibach Race Spring) system, which offers over 700 different components for nearly unlimited suspension tuning combinations. The ERS system utilizes Main and Tender spring concepts to provide a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully closes. This spring can function as a Main spring (determining final system rate), work with Tender springs (for initial rate tuning), or pair with Helper springs to prevent spring looseness at full droop.

Key Features:

• 2.50" inner diameter for coilover compatibility
• 550 lb/in linear spring rate for consistent performance
• 5.5" free length optimized for racing applications
• High spring travel and deflection capability at short mounting lengths
• Shot-peened surface treatment for increased fatigue resistance
• Phosphate and epoxy coating provides superior corrosion protection
• Precise manufacturing tolerances ensure consistent performance
• Part number imprinted directly on spring for easy identification
• Block resistance design prevents coil binding
• Compatible with Eibach connecting plates for multi-spring configurations

Ideal for off-road racing, track vehicles, and serious motorsports applications where precise suspension tuning is critical for optimal handling, reduced body roll, and minimal squat and dive during acceleration and braking.