Occasionally someone posts a good deal available for a limited time... like this:
ST145/R12 Trailer Tire Assembly for $99.99 from July 23 - July 28 in
this week's sale flyer (page 14).
These are
145R12 C tires for trailer service only, the smallest size in Carlisle's
Radial Trail RH series, with a steel wheel included. They are incorrectly listed as "ST145/R12" in the ad, and also incorrectly listed as "ST145/12" in
Carlisle's online listing. The sticker I saw on these in the store was even worse, showing them as ST145/75R12, I think... but the sidewall clearly shows that they are 145R12 C (commercial), Load Range D.
These may only be a good deal if you need wheels, and are buying in Canada.
I realize that few of our trailers use 12" wheels, but if you have a
Fiber Stream, for instance, these are a good upgrade from old-style 5.20-12
tires, or even 4.80-12 if you don't mind the extra inch of overall diameter.