Coil Over Spring Pre-Load Cage

The HOWE Coil Over Spring Pre-Load Cage (Part Number 30209) is a precision suspension tuning component designed for custom-built performance suspensions that demand adjustable spring preload control. This polished aluminum pre-loader cage is engineered specifically for 10-inch shock absorbers paired with 3-inch diameter coil-over springs, allowing technicians and suspension specialists to dial in precise spring compression and ride height geometry without disassembling the entire shock assembly.

Constructed from lightweight polished aluminum, this pre-load cage reduces unsprung weight while maintaining the rigidity required to control spring force consistently across suspension travel. The cage design allows for repeatable adjustment of spring preload, which directly affects suspension stiffness, load-carrying capacity, and vehicle ride height—critical parameters in off-road vehicles, race trucks, and custom builds where suspension geometry changes demand precise tuning. Weighing 1.49 lbs, the component integrates seamlessly into coil-over assemblies without adding unnecessary mass to the suspension system.

This pre-load cage is built for builders and technicians working on high-performance suspension systems—fabricators, off-road enthusiasts, and shop professionals who require modular, field-adjustable preload solutions. It's particularly suited for vehicles running custom coil-over kits where spring rate optimization is part of ongoing suspension setup refinement. The polished aluminum finish resists corrosion during installation and storage, and the compact dimensions (5.15 × 4.1 × 8.4 inches) fit within standard suspension packaging constraints.