Barrel Spring 12in x 2.5in x 400#

The SWIFT SPRINGS Barrel Spring 12in x 2.5in x 400# (Part Number 120-250-400 B) is a coil-over barrel spring engineered for suspension tuning, vehicle recovery systems, and custom suspension builds. With a 400 pounds-per-inch spring rate, 12-inch free length, and 2.5-inch inner diameter, this spring delivers the load support and predictable deflection characteristics required for heavy-duty applications where precision spring performance directly impacts vehicle stability and payload capacity.

Constructed from hardened steel with a black powder coat finish, the spring resists rust and corrosion in demanding field conditions—critical for off-road recovery work, marine environments, and extended outdoor deployment. The 400-pound spring rate establishes a firm foundation for vehicles carrying sustained load or requiring quick response under dynamic conditions. At 6.37 pounds, this is a single-unit spring; specifications reflect the exact dimensions and rating needed for matched-pair or multi-spring configurations where consistent spring characteristics prevent binding and ensure even load distribution across axles or suspension points.

This barrel spring is the choice for operators, mechanics, and vehicle builders who require verified spring rates for winch-equipped trucks, trailer suspensions, and tactical vehicle platforms. The SWIFT SPRINGS brand is recognized for precision spring manufacturing where tolerances matter to chassis geometry and ride quality. Whether upgrading a patrol vehicle, assembling a recovery rig, or fine-tuning a custom suspension, accurate spring rates prevent sagging under duty loads and maintain proper ground clearance and handling geometry essential for both on-road transit and off-road maneuverability.