Sears Guardsman are really good tires.
Cooper tires is the main manufacture of all sears guardsman tiresCOOPER now makes the Guardsman plus tire, Sears changed suppliers a couple of years ago and increased the warrenty to 50,000 miles
Kelly tires are made by Goodyear, Sears Guardsman are made by Cooper. Both are good tires.
Omni United
Omni United makes them. See the related link for further information.
Radar tires can be purchased at Sears Auto Center.
The Sears Guardsmans by Radar are horrible. I bought Sears guardsmans in 2007 and 2010, those were good. The set I bought in Oct 2013 are horrible. They pulled to the right, so I rotated them front to back, that got me a bad shimmy. Sears went bad.
Each company makes many different types of tires. They both make premium tires and also make a value line of tires. You have to compare them evenly. Both companies make excellent tires. Uniroyal tire company is owned by Michelin Tires. Cooper is owned by no other company and makes tires for Avon, Dean, Mastercraft, Futura, Hercules, Arizonian, & Starfire. At one time they manufactured all Sears Guardsman tires. You will not go wrong with either brand of tire.
Decent tires for the price you pay. But remember you get what you pay for, and these are cheap tires, so do not expect great mileage, great handling, or anything else you expect with a great tire. These are not great tires.
Cooper Tires is the Manufacturer. They do not say what brands are built at what plant. They have tire plants in Korea, Japan, Taiwan, China and USA.
Radartires.com - a new(ish) company, based in Singapore. Sold at a variety of discount stores, they offer a wide range of tires that tend to be less than other brands. Generally the reviews I have read have been positive, considering for the fact that they are not high end tires. It looks like they also manufacture the well-known Guardsman brand sold by Sears (based on warranty information) and have good mileage warranties on their products given the price point. They also have drivers in several well-known off road racing series.
Cooper tires makes them