Z4の取扱説明書・マニュアル [全254ページ 8.04MB]
123875.pdf
gizport - 2013-09-07
http://153.127.246.254/.../123875.pdf - 8.04MB
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Mobility 197ReferenceAt a glanceControlsDriving tipsCommunicationsNavigationEntertainmentTire 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 100 mph or 160 km/hT = up to 118 mph or 190 km/hH = up to 131 mph or 210 km/hV = up to 150 mph or 240 km/hW = up to 167 mph or 270 km/hY = up to 186 mph or 300 km/hTire Identification NumberTires with DOT codes meet the guidelines of the US Department of Transportation.DOT code:Tire ageThe manufacturing date of tires is contained in the tire coding: DOT チc 3709 means that the tire was manufactured in week 37 of 2009.BMW recommends that you replace all tires after 6 years at most, even if some tires may last for 10 years.Uniform Tire Quality GradingQuality grades can be found where applicable on the tire sidewall betw een tread shoulder and maximum section width. For example:Tread wear 200 Traction AA Temperature ADOT Quality GradesTread wear Traction AA A B C Temperature A B CAll passenger car tires must conform to Federal Safety Requir ements in addition to these grades.<Tread wearThe tread wear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditio ns on a specified gov-ernment test course. For example, a tire graded 150 would wear one and one-half (1 γ) 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, how-ever, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteris-tics 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 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-ahe ad braking traction tests, and does not in clude acceleration, cor-nering, hydroplaning, or peak traction charac-teristics.<For example:Nominal width in mmAspect ratio in % Radial belt constructionRim diameter in inchesLoad rating,not on ZR tiresSpeed code letter, infront of the R on ZR tires225/45 R 1791VFor example:Manufacturer's code for tire makeTire size and tire designTire ageDOT xxxx xxx 3709
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