The Hendrickson Backbone, part number 058900-010 (also referenced as 58900-10 or 5890010), is a genuine Hendrickson suspension component sold by Pro Gear and Transmission. The backbone is a structural element of Hendrickson suspension systems, providing the primary load-bearing connection within the suspension assembly. Because backbone fitment varies by suspension model and axle configuration, calling us before ordering is the best way to confirm this part matches your specific application.FeaturesGenuine Hendrickson suspension backbonePart number 058900-010, also listed as 58900-10 or 5890010Structural suspension component for Hendrickson suspension systemsSold by Pro Gear and TransmissionCall to confirm compatibility with your specific suspension model