Conv Rear Spring 11in x 5in 250LB

The Conv Rear Spring 11in x 5in 250LB from SWIFT SPRINGS is a precision coil spring engineered for rear suspension tuning on performance and modified vehicles. Built for mechanics and enthusiasts who demand precise ride height and load control, this conventional tight-helix design allows you to dial in exactly the spring rate your application requires. Whether you're upgrading a street machine, adjusting stance on a lowered build, or fine-tuning suspension geometry, a dedicated rear spring rated at 250 pounds per inch gives you the control needed for consistent handling and predictable suspension behavior.

This rear spring measures 11 inches in length with a 5-inch outer diameter, delivering a 250 lb/in spring rate that resists compression while maintaining linear travel under load. The tight-helix construction minimizes bind-up and coil clash, critical for sustained performance and reliability during aggressive cornering or track use. Constructed from hardened steel and finished with a black powder coat, the spring resists corrosion and maintains its properties through years of daily driving or weekend duty. The single-spring design (sold individually) allows you to replace worn units or upgrade one end of the suspension without a complete overhaul, making it ideal for staged modifications or targeted suspension refresh.

This rear spring suits street rods, muscle cars, modern performance platforms, and custom builds where independent rear suspension accepts conventional coil springs. Technicians and builders often pair springs of different rates front-to-rear to optimize weight distribution and handling balance; a dedicated 250 lb/in rear unit works well in medium to heavier vehicles or setups designed for lower ride height. Always verify spring compatibility with your vehicle's suspension geometry, mounting location, and paired front-end rate before installation. Proper selection ensures safe handling, prevents bottoming, and maximizes the lifespan of suspension components downstream.