Conv Rear Spring 5in x 13in x 175#

The AFCO Racing Products Conventional Rear Spring 5-inch x 13-inch x 175# (Part No. 25175-1B) is a high-performance coil spring engineered for marine and off-road applications requiring precise load control and consistent handling dynamics. This steel spring features a 175 pound-per-inch spring rate, making it ideal for vehicles and watercraft where weight transfer management directly affects ride quality, tracking stability, and overall performance in demanding conditions.

Built to AFCO Racing Products' manufacturing standards, this rear-mounted conventional spring measures 5 inches in outer diameter with a 13-inch free length—specifications engineered to fit specific suspension and frame geometries where clearance and load distribution are critical. The 175# spring rate strikes a balance between supporting vehicle weight and maintaining compliance, essential for maintaining control during cornering, acceleration, and load shifts common to both marine towing applications and recreational off-road use. Black powder coating protects against corrosion in saltwater and harsh weather environments, extending service life compared to bare steel. Each spring is sold individually, allowing builders and technicians to match spring rates precisely to suspension needs or to replace worn components one side at a time.

This spring is specified for rear-axle or rear-suspension duty in applications where OEM or custom builders require a conventional (non-progressive) spring rate. Buyers upgrading suspension for towing, load hauling, or performance-oriented handling should verify fitment against frame mounting points, suspension architecture, and overall spring package design before ordering. AFCO Racing Products is recognized within the motorsports and performance vehicle community for precision-manufactured suspension components that meet tight tolerances and repeatability standards.