Spring 12in Coil-Over 2.5in ID Ext Travel

The Spring 12in Coil-Over 2.5in ID Ext Travel from EIBACH represents a precision-engineered suspension component designed for enthusiasts and fabricators building custom off-road vehicles, rock crawlers, and high-travel independent suspension systems. This 12-inch coil-over spring delivers the extended travel geometry needed for aggressive terrain work where factory suspension geometry falls short. Whether you're constructing a baja-style buggy, building a long-travel 4x4 kit, or upgrading a custom crawler platform, this spring provides the predictable load support and ride compliance required for consistent performance across variable terrain.

Built with a 2.5-inch inside diameter, this coil-over spring integrates seamlessly with standard monotube and dual-tube shock absorber designs commonly used in fabricated suspension applications. The 12-inch free length and extended travel rating allow for maximum suspension articulation and bump absorption without reaching bind, critical for maintaining axle droop and contact during dynamic driving. EIBACH's manufacturing precision ensures consistent spring rate across the entire compression stroke, preventing the mid-stroke harshness that occurs with lower-quality springs. At 3.7 pounds, the compact profile fits tight engine bay and frame configurations without excess weight penalty, making it ideal for weight-conscious builds where performance and reliability intersect.

Fabricators, suspension shops, and experienced DIY builders benefit most from this component when pairing it with quality dampers and custom mounts engineered for their specific vehicle platform. Installation requires proper alignment to shock centerlines and frame pickup points—professional setup ensures longevity and optimal handling characteristics. Verify 2.5-inch bore compatibility with your shock body before ordering, and confirm ride height and spring rate match your desired suspension geometry and expected vehicle weight. This spring performs exceptionally in dry weight applications and minimally sprung platforms where extended travel and consistent support define the suspension strategy.