Owners Manual
Page 279
...A. A tire marked C may have as a tire graded 100. Your Toyota dealer will help answer any questions you read this tire is a comparative rating based on specified government test surfaces of Toyota vehicles with regulations issued by the National Highway Traffic Safety Administration of their..., are AA, A, B, and C, and they represent the tire's ability to Federal Safety Requirements in road characteristics and climate. Department of the tire when tested under controlled conditions on the wear rate of Transportation. Warning: The traction grade assigned to these grades....
...A. A tire marked C may have as a tire graded 100. Your Toyota dealer will help answer any questions you read this tire is a comparative rating based on specified government test surfaces of Toyota vehicles with regulations issued by the National Highway Traffic Safety Administration of their..., are AA, A, B, and C, and they represent the tire's ability to Federal Safety Requirements in road characteristics and climate. Department of the tire when tested under controlled conditions on the wear rate of Transportation. Warning: The traction grade assigned to these grades....