BMW 5 E39 owners manual page 151

text version of content this owner's manual page from owners manual to the vehicle BMW 5 E39, year of production 1996 - 2003:

Tire replacement 151n To maintain good handling and vehicle Traction Temperature response, use only tires of a single The traction grades, from highest to The temperature grades are A (the tread configuration from a single manu- lowest, are AA, A, B and C. highest), B and C, representing the facturer. BMW tests and approves Those grades represent the tire's ability tire's resistance to the generation of wheel/tire combinations. Refer to to stop on wet pavement as measured heat and its ability to dissipate heat Overview page 153. under controlled conditions on speci- when tested under controlled condi- DOT Quality Grades fied government test surfaces of as- tions on a specified indoor laboratory phalt and concrete. A tire marked C test wheel. Treadwear may have poor traction performance. Sustained high temperature can cause Controls Traction AA A B C the material of the tire to degenerate Temperature A B C The traction grade assigned to and reduce tire life, and excessive tem- this tire is based on straight- perature can lead to sudden tire failure. All passenger car tires must con- ahead braking traction tests, and does The grade C corresponds to a level of form to Federal Safety Require- not include acceleration, cornering, hy-performance which all passenger car Car care ments in addition to these grades.< droplaning, or peak traction character-tires must meet under the Federal Mo- istics.< tor Vehicle Safety Standard No. 109. Treadwear Grades B and A represent higher levels The treadwear grade is a comparative of performance on the laboratory test Repairs rating based on the wear rate of the tire wheel than the minimum required by when tested under controlled condi- law. tions on a specified government test The temperature grade for this tire course. is established for a tire that is For example, a tire graded 150 would properly inflated and not overloaded. Technology wear one and one-half (1g) times as Excessive speed, underinflation, or ex- well on the government course as a tire cessive loading, either separately or in graded 100. The relative performance combination, can cause heat buildup of tires depends upon the actual condi- and possible tire failure.< tions of their use, however, and may Data depart significantly from the norm due to variations in driving habits, service practices and differences in road char- acteristics and climate. Index Online Edition for Part No. 01 41 0 155 420 - © 01/01 BMW Group

owners manual BMW 5 E39

owners manual BMW 5 E39 - year of production: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 - BMW 5 E39 owners manual EN