ST205/75R15 Trailer Tires

ST205/75R15 is the most common trailer tire size in the country. It fits a 15-inch wheel, measures about 27 inches tall and 8 inches wide, and is also written as 205/75R15, 205/75D15 or 205/75-15. The ST means Special Trailer: a stiffer sidewall built for the loads and sway of towing, not for use on a car or truck.

We carry it in load range C (6-ply, about 1,820 lbs per tire) and load range D (8-ply, about 2,150 lbs per tire), in both radial (R) and bias-ply (D) construction. Check the load range on your current sidewall or the capacity sticker on your trailer and match it or go up, never down. Every order ships from the U.S. with tracking.

Common questions

Is 205/75R15 the same as ST205/75R15?
Yes for size. The ST prefix marks it as a trailer-only tire. If your current tire reads 205/75R15 and the trailer is the only thing it goes on, an ST205/75R15 is the correct replacement.

Radial or bias?
Radial (R) runs cooler and wears longer on highway miles. Bias (D) has a stiffer sidewall and costs less, which suits short-haul and utility trailers. Do not mix the two on the same axle.

Do you sell it mounted on a wheel?
Yes. See our ST205/75R15 trailer tire and wheel assemblies, mounted, balanced and inflated, in 5 on 4.5 bolt pattern.