Conventional Spring 13in x 5in 50lb

The Conventional Spring 13in x 5in 50lb from SWIFT SPRINGS is a premium linear-rate coil spring designed for suspension tuning and vehicle modification applications. This spring is ideal for performance street cars, drift platforms, and autocross competitors, providing consistent load support and predictable handling characteristics essential for chassis dynamics.

With a 50-pound-per-inch rate and a free length of 13 inches, this SWIFT SPRINGS unit maintains a clean outer diameter of 5.5 inches, fitting within tight packaging constraints common in lowered or modified suspensions. The linear spring constant ensures predictable ride height changes and repeatable suspension stiffness across the travel range, which is critical for tuning corner balance and load transfer during cornering.

At 4 lbs per spring, the lightweight construction minimizes unsprung mass, directly improving wheel articulation and reducing steering input lag. The 5.5-inch coil pitch provides stable seating in OEM and aftermarket perches while maintaining proper damper compatibility. This conventional spring is suitable for front or rear applications on compact to mid-size performance vehicles, including Japanese sports cars and turbocharged platforms.