Maximize suspension performance with swift springs 5×2.5 inch (65mm) — the ultimate choice for tuners and racers who demand precision, responsiveness, and reliability. Engineered in Japan using Swift’s proprietary spring steel, these coilover springs deliver unmatched linear rate performance, reduced weight, and exceptional durability under even the most extreme conditions.

The swift springs 5×2.5 inch (65mm) model is compatible with coilover systems utilizing a standard 2.5-inch inner diameter spring seat. These springs are available in an extensive range of rates — 8K, 10K, 12K, 14K, 16K, 18K, 20K, 22K, 24K, 26K, 28K, 30K, 32K, 34K, 38K, 42K, 46K, and 50K — making it easy to find the perfect match for your vehicle’s suspension setup and driving goals.

Each set of swift springs 5×2.5 inch is sold in pairs of two — no single spring options are available. Selling as matched pairs ensures consistent compression, balanced corner loading, and predictable handling across the entire chassis. Every spring pair is tested, rate-verified, and weight-matched before packaging, ensuring exceptional accuracy and long-term consistency.

The 5-inch length provides a versatile fit for both performance street cars and dedicated race builds, offering increased travel over shorter spring configurations. Whether you’re chasing cornering precision, lowering balance, or improved traction under acceleration, these springs deliver repeatable, measurable results.

Swift’s proprietary H5S.TW spring steel material provides a higher strength-to-weight ratio than conventional coilover springs, allowing each spring to be lighter and more responsive without compromising rate accuracy or durability. This design reduces unsprung mass, improves suspension reaction, and delivers a smoother transition through compression and rebound. Even after thousands of cycles, Swift Springs retain their height and rate precision with virtually zero sag.

The true linear rate design ensures predictable behavior throughout the entire stroke range, allowing for smooth weight transfer, improved steering feel, and consistent chassis response. Combined with precise rate control and minimal hysteresis, these springs help maintain grip, balance, and composure in both track and street conditions.

Finished with Swift’s signature corrosion-resistant coating, these springs are designed to perform flawlessly in all environments while maintaining their appearance and integrity.

Key Features:

Swift Springs 5×2.5 Inch (65mm) coilover spring

Available rates: 8K–50K

Sold in pairs (2) — no single spring options

Compatible with 2.5-inch inner diameter coilover systems

True linear rate design for predictable compression and control

Lightweight construction reduces unsprung weight

Maintains height accuracy and rate precision over time

Corrosion-resistant finish for long-term use

Made in Japan to exacting quality standards

Engineered for the serious enthusiast, swift springs 5×2.5 inch offer unmatched precision, strength, and responsiveness. Whether for street performance, time attack, or professional motorsport, Swift delivers the consistency and control that define world-class suspension performance.

History about Swift Springs

Spring Options