Coil Spring Conv Rear 13in x 5in x 235lb

The Swift Springs Coil Spring Conventional Rear 13-inch x 5-inch x 235lb (model 130-500-235 TH) is a precision suspension component engineered for applications requiring controlled vertical compliance and consistent load support. This rear coil spring delivers a 235 lb/in spring rate, combining moderate stiffness with responsiveness across a wide range of payload scenarios. The tight helix design maximizes structural integrity while maintaining predictable compression characteristics under repeated cycling.

Constructed from high-strength steel with a black powder coat finish, this 13-inch conventional coil spring resists corrosion and abrasion during field deployment. The 5-inch outer diameter accommodates standard suspension mounting configurations. At 235 lb/in, this spring rate provides the balance many operators seek between articulation and stability—stiff enough to maintain ride height under load, compliant enough to absorb impacts without bottoming. The powder coat protects bare steel from moisture and salt spray, critical for extended storage and variable climate conditions.

This component suits vehicle recovery systems, off-road suspension builds, and field equipment platforms where spring rate precision matters. Users upgrading existing suspensions or assembling custom load-bearing frames rely on clearly specified spring constants to calculate deflection and ensure matching pairs deliver symmetrical performance. Swift Springs' tight helix construction minimizes lateral movement and resonance—factors that reduce vibration transmission and extend service life of mounted systems.

The 235 lb/in specification positions this spring in the moderate-stiffness range, neither over-sprung for lightweight loads nor under-sprung for heavy-duty applications. Specifications are metric-derived and verified against OEM standards. Each spring is sold individually; paired installations require purchasing two units to ensure matched performance and balanced handling.