Quote:
Originally Posted by Tireman9
Still can't find the test procedure for the various SAE speed symbols in FMVSS.
Where in FMVSS regulations did you find the statement on speed ratings that you quoted?
Yes NHTSA does have "high Speed" tests but the duration is short and I cannot find different test procedures for L, M, S, T H etc speed ratings in their requirements.
Your quote might be from SAE but they are not a regulatory agency as DOT is. Also SAE specifically states that their speed ratings are intended for passenger car tires only.
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That's from a long NHTSA interpretation file.
Everything the tire manufacturer puts on the tire sidewall must be reported and accounted for in documentations before they can put the
DOT on there.