Take control of your suspension setup with swift springs 6×2.5 inch (65mm) — the go-to choice for tuners, racers, and performance enthusiasts who demand precise handling, durability, and long-term consistency. Crafted in Japan using Swift’s proprietary H5S.TW spring steel, these coilover springs are engineered for superior response, lighter weight, and unmatched spring rate accuracy.

The swift springs 6×2.5 inch (65mm) model fits coilover systems using a standard 2.5-inch inner diameter spring seat and is available in an extensive lineup of rates — 4K, 5K, 6K, 7K, 8K, 9K, 10K, 11K, 12K, 13K, 14K, 15K, 16K, 18K, 20K, 22K, 24K, 26K, 28K, 30K, 32K, and 34K. This range makes it easy to fine-tune your suspension for everything from street comfort to aggressive track performance.

Each set of swift springs 6×2.5 inch is sold in pairs (2) — no single spring options. Selling in matched pairs ensures perfect balance, compression rate consistency, and equal load distribution between sides. Every pair is load-tested, weight-matched, and quality-verified to deliver precise and predictable performance across both springs.

The 6-inch length is ideal for setups requiring additional suspension travel and smoother damping control — perfect for street cars, time attack builds, autocross vehicles, or mixed-use performance applications. The added spring length allows for improved compliance and stability under compression while maintaining the linear rate feel Swift is known for.

Using Swift’s proprietary H5S.TW steel alloy, these springs provide superior elasticity and durability while being significantly lighter than conventional coilover springs. This reduction in unsprung weight translates into faster suspension reaction, more consistent handling, and improved feedback through every corner. Swift’s engineering minimizes sag and fatigue, ensuring that spring height and rate remain consistent even after years of use.

All Swift Springs feature a true linear rate design, meaning the compression force increases evenly as the spring compresses. This delivers precise steering feel, consistent chassis behavior, and improved grip during aggressive cornering, braking, or acceleration. Combined with their lightweight design and high spring rate accuracy, these springs provide the ultimate suspension tuning foundation.

Finished with Swift’s signature corrosion-resistant coating, these springs perform reliably in all conditions while maintaining their clean, professional appearance.

Key Features:

Swift Springs 6×2.5 Inch (65mm) coilover spring

Available spring rates: 4K–34K

Sold in pairs (2) — no single spring option

Compatible with 2.5-inch inner diameter coilover systems

True linear rate design for predictable compression

Lightweight construction reduces unsprung weight

Maintains height accuracy and rate precision over time

Ideal for street, performance, and motorsport use

Made in Japan with strict quality control

Whether you’re refining a daily driver or pushing limits at the track, swift springs 6×2.5 inch deliver precision, control, and long-term performance that set the standard for professional suspension tuning.

History about Swift Springs

Spring Options