Saab 9 3 II 2 YS3F owners manual page 240

text version of content this owner's manual page from owners manual to the vehicle Saab 9-3, year of production 2002 - 2011:

238 Car care Uniform Tire Quality GradingTreadwear Temperature – A, B, C Quality grades can be found where applica-The treadwear grade is a comparative The temperature grades are A (the highest), ble on the tire sidewall between tread shoul-rating based on the wear rate of the tire B, and C, representing the tire’s resistance der and maximum section width. For exam-when tested under controlled conditions on to the generation of heat and its ability to dis- ple: a specified government test course. For sipate heat when tested under controlled example, a tire graded 150 would wear one conditions on a specified indoor laboratory Treadwear 200 Traction AA Temperature and a half (1.5) times as well on the govern-test wheel. Sustained high temperature can A ment course as a tire graded 100. The rela-cause the material of the tire to degenerate The following information relates to the tive performance of tires depends upon the and reduce tire life, and excessive temper- system developed by the United States actual conditions of their use, however, and ature can lead to sudden tire failure. The National Highway Traffic Safety Administra-may depart significantly from the norm due grade C corresponds to a level of perfor- tion, which grades tires by treadwear, trac-to variations in driving habits, service prac-mance which all passenger car tires must tion and temperature performance. (This tices and differences in road characteristics meet under the Federal Motor Vehicle applies only to vehicles sold in the United and climate.Safety Standard No. 109. Grades B and A States.) The grades are molded on the side-represent higher levels of performance on walls of most passenger car tires. The Uni-Traction – AA, A, B, Cthe laboratory test wheel than the minimum form Tire Quality Grading system does not The traction grades, from highest to lowest, required by law. apply to deep tread, winter-type snow tires, are AA, A, B, and C. Those grades repre-Warning: The temperature grade for this tire space-saver or temporary use spare tires, sent the tire’s ability to stop on wet pave-is established for a tire that is properly tires with nominal rim diameters of 10 to 12 ment as measured under controlled condi-inflated and not overloaded. Excessive inches (25 to 30 cm), or to some limited-pro-tions on specified government test surfaces speed, underinflation, or excessive loading, duction tires. of asphalt and concrete. A tire marked C either separately or in combination, can While the tires available on General Motors may have poor traction performance. Warn-cause heat buildup and possible tire failure. passenger cars and light trucks may vary ing: The traction grade assigned to this tire with respect to these grades, they must also is based on straight-ahead braking traction conform to federal safety requirements and tests, and does not include acceleration, additional General Motors Tire Perfor-cornering, hydroplaning, or peak traction mance Criteria (TPC) standards.characteristics.

owners manual Saab 9-3

owners manual Saab 9-3 - year of production: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 - Saab 9 3 II 2 YS3F owners manual EN