Conventional Spring 9.5in x 5.5in x 400

The Conventional Spring 9.5in x 5.5in x 400 (Part Number 950-550-400) is a heavy-duty coil spring engineered for front-end suspension systems where consistent load support and durability are critical. With a 400 lb/in spring rate, this conventional spring delivers predictable performance across demanding operational environments, from vehicle recovery operations to long-term equipment mounting applications.

Constructed from steel and finished with black powder coat protection, this spring resists corrosion and maintains integrity under sustained load cycles. The 5.5-inch outer diameter and 9.5-inch length balance compact installation footprint with sufficient compression travel for shock absorption and load distribution. The 400 lb/in rate is the sweet spot for front-suspension duty—firm enough to support vehicle weight without excessive sagging, yet compliant enough to absorb impacts from rough terrain and unexpected load shifts.

This spring serves applications where OEM or aftermarket suspension upgrades are necessary: off-road vehicles, recovery and towing platforms, or equipment mounts requiring stable, repeatable load handling. The powder-coated finish protects against salt air, mud, and the elements encountered in field operations. At 6.35 lbs, this spring is substantial enough for serious duty yet manageable for installation and adjustment in the field.

Conventional coil springs remain the industry standard for suspension systems because they offer simplicity, reliability, and predictable behavior across temperature ranges and load cycles. This 400 lb/in unit is designed to handle the real-world punishment of tactical vehicles, emergency response platforms, and ruggedized equipment transport where suspension durability directly impacts operational readiness.