Spring 15in Rear 5in OD

The Eibach 15-inch Rear Coil Spring with 5-inch outer diameter (OD) is a precision-engineered suspension component designed for drivers and mechanics seeking to dial in rear-end geometry and load handling. This spring sits at the heart of modern chassis tuning, where ride height, spring rate, and axle control directly influence cornering grip, brake balance, and driver feedback. Whether you're building a track car, restoring a classic with modern suspension geometry, or fine-tuning a daily driver for improved handling characteristics, this rear spring delivers the foundation for controlled, predictable vehicle dynamics.

Eibach springs are manufactured to exacting standards, utilizing high-quality steel and precision winding to maintain consistent spring rate across the load curve. The 15-inch length and 5-inch OD dimensions place this spring in the mid-range duty category, suitable for both street and moderate performance applications where predictable compliance and durability matter. The 8.2 lb weight reflects the material density and engineering required to handle repeated suspension articulation without fatigue failure. Eibach's manufacturing process ensures minimal variance between springs, critical for maintaining balanced left-to-right rear suspension geometry and eliminating understeer or oversteer bias caused by mismatched spring rates.

This rear spring benefits drivers upgrading from worn OEM springs, those installing lowering kits, or mechanics assembling custom suspension packages where spring rate selection directly impacts anti-squat performance and weight transfer. Compatibility depends on your vehicle's rear suspension design—double-check your application against the spring's length and mounting diameter before installation. Professional installation is recommended to ensure proper seating, correct ride height measurement, and alignment verification post-installation. Pair this spring with matched front components and quality shock absorbers to optimize the entire suspension system for your intended driving style.