Federal Motor Vehicle Safety Standards; Tire Selection and Rims

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This document amends Federal Motor Vehicle Safety Standard (FMVSS) No. 110 to make it clear that special trailer (ST) tires are permitted to be installed on new trailers with a gross vehicle weight rating (GVWR) of 4,536 kg (10,000 lbs.) or less. It also excludes these trailers from a requirement that a tire must be retained on its rim when subjected to a sudden loss of tire pressure and brought to a controlled stop from 97 km/h (60 mph). The agency proposed these changes and, after a review of the comments received, has determined that these two revisions are appropriate and will not result in any degradation of motor vehicle safety.