The Tire and Rim Association, Inc. (TRA) is the standardizing body for the tire, rim, valve and allied parts industry for the United States. TRA was founded in 1903 and its primary purpose is to establish and promulgate interchangeability standards for tires, rims, valves and allied parts. TRA standards are published in the Tire and Rim Year Book, Aircraft Year Book and supplemental publications. TRA membership is limited to manufacturers of tires, rims and wheels and allied parts. TRA has available rim inspection material (tapes and gauges) to check rim contours to TRA standards.