Stemco, established in 1951, offers a range of wheel end components to the heavy and medium duty vehicle markets. Its products include wheel seals, hub caps, pinion seals, hubodometers and axle spindle nuts. The company offers a variety of bearings that include radial ball bearings and clutch release bearings. Its product brands include Grit Guard, Guardian, Voyager, Discover, Pro-Torq, Sentinel, DataTrac and BAT RF. The company also provides onsite wheel end training for mechanics that covers various topics, such as assembly, cleaning and failure analysis of wheel end components. Stemco s quality certifications include ISO 9001, QS 9000 and TS-16949. Its corporate office and manufacturing facilities are located in Longview, Texas.