Temperature B

…does not accurately assess how well or poorly a tire will fare with regards to high ambient temperature. Tires with an "A" rating can exceed 115 mph in the lab test. Tires with a "B" rating can attain speeds between 100 and 115 mph. And tires with a "C" rating can reach…

…at high speeds without failure by running an inflated test tire against a large diameter high-speed laboratory test wheel. Temperature Grades Speeds in mph A Over 115 B Between 100 to 115 C Between 85 to 100 Every tire sold in the United States must be capable of earning a "C" rating which indicates…

…temperature capabilities. Treadwear is a rating on how long the tire should last; the higher the number, the longer the life of the tire in theory. Traction is rated on a scale similar to grades in school (C, B, A), but instead of an A+, there's AA at the top. Temperature rating is rated C, B or…

…a "bias ply" construction. Tires using this construction are for light truck and spare tire applications. If the R in the size was replaced with a B (225/50B16), it would identify that the tire body plies not only crisscross the tire on a diagonal as before, but that they are reinforced with belts…