Eibach 1000.225.0425 ERS Linear Coilover Spring 10in x 2.25in 425 lbs/in

The Eibach 1000.225.0425 ERS (Race Spring System) Linear Main Spring is a precision-engineered coilover spring measuring 10.00 inches in length, 2.25 inches in diameter, with a spring rate of 425 lbs/in. Finished in Eibach's signature red powdercoat, this spring is a core component of the ERS lineup — the standard coilover spring trusted by racers and performance enthusiasts worldwide.

Eibach ERS springs are designed to precise tolerances, delivering exceptional consistency in rate, linearity, and measurement across every unit. Each spring is individually tested to verify its rated spring rate, ensuring predictable and repeatable suspension performance whether on track or on the street.

Key Features:

• Length: 10.00 inches (254 mm)
• Inner Diameter: 2.25 inches (57 mm)
• Spring Rate: 425 lbs/in (linear)
• Maximum travel combined with minimal block heights for optimized suspension travel
• Ultra-lightweight construction using Super Hi-Ten steel to reduce unsprung mass
• Specialized shot peening for spring surface stabilization and fatigue resistance
• Each spring preset to block for sag resistance and long-term rate retention
• Individually tested for highest linearity and guaranteed rate consistency
• Part of the ERS program spanning over 1,300 single-component springs in metric and imperial sizes

Eibach backs ERS springs with a 5-year warranty against factory defects in material and workmanship when used on passenger cars and light-duty (Class 1–3) trucks under normal operating conditions. Sold individually as a single spring.