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UTQG ratings on sidewall of Toyo Tires Proxes R39 tire UTQG ratings (top) and tire code (bottom) on sidewall of Continental ContiProContact tire. Uniform Tire Quality Grading, commonly abbreviated as UTQG, is a set of standards for passenger car tires that measures a tire's treadwear, temperature resistance and traction.
Starting in 1972 tires were specified by load rating, using a letter code. In practice, a higher load rating tire was also a wider tire. In this system a tire had a letter, optionally followed by "R" for radial tires, followed by the aspect ratio, a dash and the diameter – C78-15 or CR78-15 for bias and radial, respectively. Each diameter of ...
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NHTSA established the Uniform Tire Quality Grading System , is a system for comparing the performance of tires according to the Code of Federal Regulations 49 CFR 575.104; it requires labeling of tires for tread wear, traction, and temperature.
A Union of Concerned Scientists newsletter says "LRR tires also meet the same federal standards for treadwear, traction, and temperature resistance as regular tires." [11] Older Low-rolling resistance tires may reduce ability to grip, especially when taking corners, and may also wear out more rapidly. [12]
A tire company that sells winter tires has issued a recall for more than 540,000 of its snow tires, which do not comply with North American standards due to lack of proper traction on snow.