1995 Cadillac Eldorado Owner's Manual - Page 306

Uniform Tire Quality Grading The following information relatesto the system developed by the United States NationalHighway TrafficSafety Administration which grades tires by treadwear, traction and temperature performance. (This applies only to vehicles sold in the United States.) Treadwear The treadwear grade a comparative rating based on wear rate of the is the tire when tested under controlled conditions a specified government on a test course. For example,tire graded 150 would wear one and ahalf (1 1/2) times aswell on thegovernment course as a tire graded100. The relative performanceof tires depends upon actual conditions their the of use, however, and may depart significantly from the normdue to variations in driving habits, service practices and differences road in characteristics and climate. Traction A, B, C The traction grades, from highest to lowest are: A, B, and C. They represent thetire's ability to stop on pavement as measured under wet of controlled conditions on specified government test surfaces asphalt and concrete. A tire markedC may have poor traction performance. Warning: The traction grade assigned to this tireis based on braking (straight-ahead) traction tests and does not include cornering (turning) traction. - 6-47