Spring Rear 20in x 5in x 100#

The Spring Rear 20in x 5in x 100# from EIBACH is a precision-engineered coil spring designed for rear suspension tuning and performance vehicle modifications. Built for enthusiasts and professional mechanics seeking to dial in ride height, load capacity, and handling characteristics, this spring delivers the consistent performance that separates properly engineered suspensions from off-the-shelf compromises. EIBACH's reputation for precision spring manufacturing makes this component a trusted choice for custom suspension builds, track preparation, and street performance applications where suspension geometry and spring rate directly impact vehicle dynamics.

This rear spring features a 100-pound spring rate, 20-inch length, and 5-inch outer diameter—specifications that define its load-handling capacity and deflection characteristics under vertical suspension travel. The spring rate determines how much force is required to compress the spring one inch, making the 100# rating suitable for vehicles ranging from street-tuned performance cars to lightly modified daily drivers. EIBACH's manufacturing process ensures consistent wire diameter, coil pitch, and heat treatment across production runs, eliminating the variance that plagues budget alternatives. The 7.53 lb weight and compact packaged dimensions reflect the spring's efficiency without unnecessary material, critical for minimizing unsprung mass and preserving chassis responsiveness.

This rear spring performs best on vehicles requiring mid-range spring rates for balanced handling and comfort—typical applications include sport-oriented sedans, coupes, and light-duty trucks undergoing suspension upgrades. Proper installation requires removing the rear suspension assembly, replacing worn or stock springs, and verifying that ride height, camber, and suspension geometry remain within manufacturer specifications. Pairing this spring with quality shock absorbers, appropriate sway bars, and bushing upgrades delivers comprehensive suspension refinement. Always verify compatibility with your specific vehicle platform and consult suspension geometry data before ordering, as incorrect spring selection can compromise handling safety and accelerate component wear.