Outfit your semi to be Ready for the Road Ahead , with the NTN 5.315" Steel Cylindrical Tapered Roller Bearing that enhances efficiency while minimizing stress caused by radial and axial loads. With a composition of inner and outer rings forged around a set of rolling elements, this replacement tool is the ideal solution to distribute the applied weight from various components. Manufactured with a flexible and corrosion-resistant rubber for low-effort installation and long-term reliability. FleetPride is your First Click in Heavy Duty .