Spring Rear 13in x 5in x 225# Platinum

The Spring Rear 13in x 5in x 225# Platinum from Eibach represents a precision-engineered coil spring designed for serious automotive enthusiasts seeking predictable rear suspension performance and refined ride quality. This rear spring is engineered for vehicles requiring a 225-pound spring rate, making it ideal for daily drivers, weekend warriors, and modified vehicles where factory suspension geometry needs fine-tuning without aggressive lowering or harsh compliance issues. Whether you're dialing in a street car, addressing rear-end squat under acceleration, or balancing a modified chassis, this Eibach spring delivers consistent support across load ranges.

Eibach's Platinum-grade coil springs are manufactured using high-quality spring steel with proprietary heat-treatment processes that ensure consistent rate linearity and extended fatigue life compared to OEM springs. The 13-inch free length and 5-inch coil diameter provide optimal mounting geometry in most rear suspension configurations, while the 225-pound rate sits in the sweet spot between maintaining comfort and providing measurable anti-squat characteristics under cornering and acceleration loads. This spring's tight manufacturing tolerances mean each unit delivers predictable compression and rebound behavior, eliminating the inconsistency found in entry-level or counterfeit alternatives that plague budget rebuilds.

Mechanics and tuners frequently specify Eibach rear springs when customers report excessive rear-end motion, fade under hard braking, or uneven weight transfer during acceleration. This particular 225# spring pairs seamlessly with factory or aftermarket dampers, making it a direct replacement or upgrade path for vehicles originally equipped with similar spring rates—verify your vehicle's original spring specifications against the 13-inch length and 5-inch diameter before ordering. Installation requires basic suspension tools and jack stands; ensure both rear springs are replaced as a matched pair to maintain balanced chassis dynamics and prevent handling surprises. Weighing 6 pounds per spring, this component is manageable for home technicians and professional shops alike, with no special installation hardware or vehicle-specific adapters required for most rear suspension designs.