It has been pointed out to WEVTU that federal specifications for tire pressure, when vehicles undergo federal test procedure (FTP) testing on twin-roller dynamometers, state that “the drive wheel tires may be inflated up to a gauge pressure of 45 psi in order to prevent tire damage.” Sources at both the U.S. Environmental Protection Agency (EPA) and automakers tell WEVTU that “virtually all cars and light trucks are (FTP) tested with drive wheel tires at 45 psi plus/minus 2 psi.” This ...

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