At Maxxis site, I couldn't find any thing about speed rating, however under their FAQ, Maxxis recommends that ST tires not go faster than 65 mph.
ktmrfs wrote:
the carsilie site doesn't list a speed rating on there website for ST tires, at least that I could find, same with Maxxis.
I wonder how many seller sites list "R" for speed rating , not realizing that the "R" in tire designation means "radial". and the speed rating is stamped in code on the side of the tire.
So, until I either (a) see a mfg website with a speed rating over "Q" or 65mph for an ST tire, I'll not be convinced that there are ST tires rated above 65mph.
or (b) have someone post a picture of an ST tire showing a speed rating other than "Q" or 65 mph.