For S-speed-rated tires, it's 112 mph; for T, 118 mph. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. Some tires have speed ratings of W, 168 mph and Y, 186 mph.

That last letter is important, as all H rated versions of this tire come with a 75,000-mile limited warranty, vs. a ...