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5. X3 の取扱説明書・マニュアル

X3の取扱説明書・マニュアル [全132ページ 3.62MB]

Wheels and tires88Tire identification marksKnowledge of the labeling on the side of the tire makes it easier to identify and choose the right tires.Tire sizeSpeed code letterT = up to 118 mph/190 km/h H = up to 131 mph/210 km/hV = up to 150 mph/240 km/hW = up to 167 mph/270 km/hY = up to 186 mph/300 km/hTire Identification NumberTires with DOT codes meet the guidelines of the U.S. Department of Transport.DOT code:Tire ageThe tire's date of manufacture is indicated on the sidewall:DOT ... 3603 indicates that a tire was man-ufactured in week 36 of the year 2003.BMW recommends that you replace all tires after 6 years at the latest, indepen-dently of the fact that tires can reach an age of 10 years.Uniform Tire Quality Grading Quality grades can be found where appli-cable on the tire sidewall between tread shoulder and maximum section width. For example:Tread wear 200 Traction AA Temperature ADOT Quality GradesTreadwear Traction AA A B C Temperature A B C All passenger car tires must conform to Federal Safety Requirements in addition to these grades. < TreadwearThe treadwear grade is a comparative rat-ing based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and one-half (1 g) times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate.TractionThe traction grades, from highest to lowest, are AA, A, B, and C. Those grades represent the tire's ability to stop on wet pavement as measured under controlled conditions on specified govern-ment test surfaces of asphalt and concrete. A tire marked C may have poor traction performance.The traction grade assigned to this tire is based on straight-ahead brak-ing traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics. <TemperatureThe temperature grades are A - the highest - B, and C, representing the tire's e.g.Nominal width in mmAspect ratio in X Radial typeRim diameter in inchesLoad rating(not on ZR tires)Speed rating(before R on ZR tires)205/60 R 1591We.g.Manufacturer codefor tire makeTire size andtire designTire ageDOT xxxx xxx 3603

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