Spring 1.5in ID Bump x 3.6in Tall

The Spring 1.5in ID Bump x 3.6in Tall by EIBACH is a precision bump stop designed for serious vehicle suspension builders and off-road enthusiasts. This component serves as a limiting device to prevent suspension travel beyond safe geometry limits, protecting both your suspension components and chassis during extreme compression events. Whether you're building a lifted truck, a track-focused street car, or an off-road rig, this isolator spring is engineered to absorb impact energy and maintain predictable suspension behavior when the system reaches maximum travel.

EIBACH's bump stop features a 1.5-inch inner diameter with a 3.6-inch height profile, offering controlled compression resistance without harsh binding or bottoming-out damage. The design utilizes elastomer technology that progressively increases spring rate as compression increases, providing a smooth transition from normal suspension operation into the bump stop zone. This progressive action prevents the abrupt load spike that rigid bump stops create, reducing shock loads on suspension mounts, bushings, and frame attachment points. The compact dimensions make installation straightforward in most suspension architectures, while the elastomer material resists oil degradation and maintains consistent performance across temperature extremes.

This bump stop is ideal for mechanics and fabricators working with lifted suspensions, coilover setups, and custom independent suspension systems where controlling maximum compression travel is critical. Installation typically involves mounting the isolator between the suspension arm or shock body and a fixed chassis or frame point, using the 1.5-inch ID to align with standard shock bodies or custom-built suspension components. Proper bump stop selection is essential when running aggressive spring rates or significantly increased ride height, as inadequate compression limiting can result in component failure, structural damage, or loss of vehicle control. Cross-reference with your specific suspension application to ensure correct placement and load rating for your vehicle's total weight and intended use.