Rear Suspension GM C10 73-87 Double adj. Med

The QA1 Rear Suspension GM C10 73-87 Double Adjustable Medium (part number R230-200) is a complete rear suspension kit engineered for 1973–1987 GM fullsize trucks with 10-bolt rear ends. This double-adjustable suspension system delivers independent control over ride height and spring stiffness through a 200 lb/in spring rate, making it the foundation for serious performance builds where suspension geometry and handling consistency are non-negotiable.

The kit consolidates all critical rear-end components into a single assembly: coil springs, double-adjustable shocks, torque arms, trailing arms, crossmember, and Panhard bar. The 200 lb/in spring rate is calibrated for medium-duty applications—firm enough to control load transfer and body roll during aggressive cornering or braking, yet compliant enough to manage street-level ride quality. All steel components are finished in black powder coat for corrosion resistance and durability. The modular design allows independent tuning of compression and rebound damping, letting operators dial in the exact handling response required for their specific truck configuration and driving demands.

This suspension system is purpose-built for owners upgrading vintage C10 trucks destined for highway cruising, off-road work, or performance driving where factory leaf-spring geometry introduces excessive body roll and unpredictable load-path dynamics. QA1's double-adjustable architecture eliminates the compromises inherent to single-rate fixed shocks. Installers benefit from a complete kit approach—no hunting for individual components or validating compatibility across different manufacturers. At 15.7 lbs, the assembly is substantial enough to handle serious work while maintaining the weight distribution characteristics critical to C10 chassis dynamics.