X3の取扱説明書・マニュアル [全126ページ 4.65MB]
123806.pdf
gizport - 2013-09-06
http://153.127.246.254/.../123806.pdf - 4.65MB
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Wheels and tires84Tire identification marksKnowledge of the labeling on the side of the tire makes it easier to identify and choose the right tires.Tire sizeSpeed code letterQ = up to 105 mph/160 km/hT = up to 118 mph/190 km/hH = 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 age The tire's date of manufacture is indicated on the sidewall:DOT ... 3004 indicates that a tire was manufac-tured in week 30 of the year 2004.BMW recommends that you replace all tires after 6 years at most, even if some tires may last for 10 years.Uniform Tire Quality Grading Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example:Tread wear 200 Traction AA Temperature ADOT Quality Grades Tread wear Traction AA A B C Temperature A B C All passenger car tires must conform to Federal Safety Requirements in addition to these grades.< Tread wear The tread wear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified gov-ernment test course. For example, a tire graded 150 would wear one and one-half, 1γ, times as well on the govern-ment course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their us e, however, and may depart significantly from the norm due to varia-tions in driving habits, service practices and dif-ferences in road characteristics and climate.Traction The 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 government test sur-faces 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 braking traction tests, and does not include acceleration, cor-nering, hydroplaning, or peak traction charac-teristics.<e.g. 235/50 R 18 97 VNominal width in mmCross-sectional relationship in ΞRadial tire codeRim diameter in inchesLoad rating,not for ZR tiresSpeed rating, before R on ZR tirese.g. DOT xxxx xxx 3603Manufacturer code for tire makeTire size and tire designTire age
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