Spring Rear 5.0in OD x 18in 75lbs

The Spring Rear 5.0in OD x 18in 75lbs from Landrum Springs is a performance coil spring engineered for rear suspension systems on lifted trucks, off-road vehicles, and custom builds seeking enhanced load capacity and ride control. This 75-pound rate spring addresses the need for consistent spring force across extended travel, making it ideal for crews running heavier payloads, towing setups, or independent rear suspension (IRS) platforms where factory springs fall short. Whether you're building a prerunner, upgrading a work truck, or tuning a street machine, rear springs are the foundation of predictable chassis geometry and driver confidence under load.

Landrum Springs' construction uses high-tensile steel wire wound to a 5.0-inch outer diameter with an 18-inch free length, delivering a linear 75-pound-per-inch spring rate that resists bottoming and maintains consistent suspension compliance throughout the travel envelope. The compact 5.9 x 5.65-inch diameter footprint fits most OEM and aftermarket spring perches, while the 4.86-pound weight keeps unsprung mass minimal—critical for both ride quality and off-road articulation. Coil spring design provides zero friction compared to leaf systems, offering superior bump absorption and predictable force curves that work seamlessly with modern dampers and adjustable coilover kits.

Mechanics and fabricators favor Landrum rear springs for custom IRS conversions, lift kit builds, and weight-transfer-critical applications where spring rate matching directly affects handling balance and load distribution. Installation requires proper perch alignment and damper tuning; verify your vehicle's OEM spring rate and total suspension geometry before selection to ensure the 75-pound rate complements your shocks and anti-roll bar setup. Pair this spring with quality dampers, control arm geometry checks, and alignment to unlock predictable braking behavior, cornering stability, and payload capability on both street and trail.