Eibach 0800.225.0850 ERS Race Main Coilover Spring

The Eibach 0800.225.0850 is a race main coilover spring from Eibach's ERS double spring system. The Main spring has a linear-rate characteristic and determines the final rate of the spring system, giving racers and weekend enthusiasts a dependable base for tuning suspension balance.

How the ERS system works:

• The ERS system pairs a Main spring with a Tender spring. The system starts with a softer initial rate while both springs are compressed together, then moves to a firmer ending rate once the tender spring closes completely.
• The Main spring sets the final rate of the system, while the Tender spring sets the initial rate.
• A Helper spring can be added to keep the Main spring seated at full wheel droop. It has very little spring rate and does not change suspension characteristics. Up to 50mm of spring-to-perch gap can be covered with a Helper spring.
• Connecting plates join Main and Tender springs. Eibach offers both inside and outside diameter plates, depending on the dimensions and function of the damper used.

Key Features:

• Can be combined with standard spring components for a wide range of setup combinations
• High spring travel (deflection), and therefore high end loads at short mounting lengths
• Block resistance
• Surface treated through shot-peening
• High dynamic durability for long component life
• Precise tolerances
• Corrosion protection by phosphating and epoxy coating
• Individual protective packaging
• Imprinted with the part number for easy identification, which indicates spring rate and physical dimensions

A properly tuned spring system balances compliance over road irregularities with the firmness needed to limit body roll, squat and dive during cornering, acceleration and braking.