Federal Motor Vehicle Safety Standards; New Pneumatic and Certain Specialty Tires

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This final rule amends Federal Motor Vehicle Safety Standard (FMVSS) No. 109, New pneumatic and certain specialty tires, to change the test pressure for the physical dimensions test for T-type tires (temporary use spare tires) from 52 pounds per square inch (psi) to 60 psi. This increase in test pressure for the physical dimensions test will marginally increase the stringency of the test and will align FMVSS No. 109 with international and voluntary consensus standards.