Young Blonde Girl Shows Off Her Body On Tires

The Tire and Rim Association (T&RA) is a voluntary U.S. standards organization to promote the interchangeability of tires and rim and allied parts. Of particular interest, they published key tire dimension standards, key rim contour dimension standards, key tire valve dimension standards, and load / inflation standards.
• ETRTO
The European Tyre and Rim Technical Organization (ETRTO) is the European standards organization "to establish engineering dimensions, load/pressure characteristics and operating guidelines" . for tires, rims and valves. It is analogous to T&RA.