Coil Over Spring Rubber Yellow 5

The LONGACRE Coil Over Spring Rubber Yellow 5 (part number 52-61005) is a precision suspension component engineered for oval track racing and performance motorsports applications. This soft polyurethane spring rubber is rated at 5 durometer—a measurement of material hardness that directly impacts how a coil-over suspension system transfers load and maintains consistent contact patch pressure during cornering, acceleration, and braking events.

Designed for springs in the 2.5 to 2.625 inch range, this rubber isolator stands 0.75 inches tall and is color-coded yellow for easy identification on the shop floor or during vehicle setup. The 5 durometer rating represents a soft compound that excels at dampening vibration and micro-oscillations without introducing the harshness associated with stiffer elastomers. This durometer choice is commonly paired with lighter vehicles or setups requiring maximum compliance in the suspension's spring rate curve. LONGACRE's polyurethane construction resists degradation from UV exposure, ozone, and temperature cycling—critical factors in racing environments where suspension components endure repeated high-load cycles.

This product is essential for oval track competitors, drag racing teams, and chassis builders who demand precise control over suspension geometry and compliance. Whether you're fine-tuning a short-track car for mid-season setup changes or building a new competition vehicle, having the correct durometer spring rubber is fundamental to achieving predictable handling and tire wear patterns. Individual rubber replacements allow mechanics to adjust suspension feel without replacing entire coil-over assemblies, making this a cost-effective tuning solution.

LONGACRE racing suspension components are recognized in short-track and oval racing communities for precision manufacturing and consistent quality. This yellow 5 durometer rubber is a direct replacement or upgrade component for any LONGACRE coil-over system or compatible third-party suspension kits using standard 2.5–2.625 inch coil spring dimensions. Each rubber is sold individually; teams typically maintain multiple durometer options on hand to support quick setup adjustments between practice sessions and feature races.