go here, it will have most companies:
http://en.wikipedia.org/wiki/Category:Tire_manufacturers
There are hundreds of tire companies in the US
Companies that offer cheap rim and tire packages are Auto Zone and Tire Rack. These two companies beat all competitors in providing cheap rim and tire packages.
To name one of the most profitable American based tire companies there is Goodyear Tire and Rubber Company, with headquarters in Akron, Ohio in the United States.
Wheel and tire packages are manufactured by companies such as Element Wheels, Wheel Fire, Performance Plus Tire, Victoria Tire, JcWhitney, and Summit Racing.
There are several discount tire companies around the US. NTB (or National Tire and Battery) has great deals on tires, as well as Firestone Tire and Goodyear.
There are many companies which sell road tires. Kal Tire, Fountain Tire, Sears Tire and Canadian Tire all sell various sizes of tires. Walmart and Costco have tire shops located in their stores as well.
23.5-25 is bias ply tire 23.5r25 is radial tire
There are numerous tire companies that produce truck tires. Some of the most widely recognizable name in the truck tire industry include Goodyear, Michelin, and Bridgestone.
There are numerous tire brands that make skid steer tires. Just to name are few there are Titan, Goodyear, Bridgestone and many other tires companies.
The United States of America has many good tire companies. Firestone, Goodyear, Cooper, and B.F. Goodrich are all examples of good American tire companies.
Since your question is listed under American Cars I'll give you this list: Goodyear and Cooper Tire. They the last two major American tire companies. Both make a fine product at a fair price. COO of TireTyre.com
That is a very common size, made by all tire companies.