NHTSA Amends Safety Standards for Trailer Tires

The National Highway Traffic Safety Administration is amending federal safety standards to clarify special trailer (ST) tires are allowed on new trailers with a gross vehicle weight below 10,000 pounds, it said in a final rule (here). The final rule also amends Federal Motor Vehicle Safety Standard No. 110 to exclude 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 60 mph. The final rule takes effect Nov. 9.