Spring Rear 5.0in OD x 18in 125lbs

The Spring Rear 5.0in OD x 18in 125lbs coil spring is a precision-engineered suspension component designed for heavy-duty applications requiring reliable, consistent load support. Built for rear-axle mounting, this spring delivers predictable force delivery across extended use cycles, making it an essential upgrade for trucks, trailers, and off-road platforms where factory springs have fatigued or underperformed. Whether you're restoring a vehicle, upgrading suspension geometry, or building a custom platform, this rear coil spring provides the structural foundation needed for dependable handling and load capacity.

Manufactured from high-strength steel with a gold powder coat finish, the Spring Rear 5.0in OD x 18in 125lbs features a 5-inch outer diameter and 18-inch axial length, engineered to handle a 125 lb/in spring rate for controlled compression and rebound. The gold powder coat provides superior corrosion resistance and durability in harsh environments—critical for vehicles exposed to moisture, road salt, and temperature extremes. The 125 lb/in rate balances load-carrying capability with ride comfort, offering enough stiffness to support added weight without sacrificing ride quality or becoming overly harsh on uneven terrain.

This rear coil spring is ideal for truck owners, off-road enthusiasts, and fleet operators who need a direct replacement or upgrade to worn suspension components. Installation typically requires professional alignment and suspension setup to ensure optimal performance; improper installation or mixing spring rates between axles can compromise vehicle stability. The conventional coil design integrates seamlessly with most leaf-spring and coil-spring rear suspensions commonly found on trucks and utility vehicles, though compatibility verification with your specific platform is recommended before purchase.