MINIの取扱説明書・マニュアル [全269ページ 8.83MB]
ownersmanual2012hardtopclubman.pdf
gizport - 2013-09-05
http://libraryofmotoring.info/.../ownersmanual2012hardtopclubman.pdf - 8.83MB
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Wheels and tires MOBILITY 205Tire Identification NumberTires with DOT codes meet the guidelines of the US Department of Transportation.DOT code:Uniform Tire Quality GradingQuality 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 GradesTread wear Traction AA A B C Temperature A B CAll passenger car tires must conform to Federal Safety Requirements 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 conditions 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 conditio ns of their use, how-ever, and may depart si gnificantly 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 con-trolled conditions on specified government 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 braking traction tests, and does not incl ude acceleration, corner-ing, hydroplaning, or peak traction characteris-tics.<TemperatureThe temperature grades are A, the highest, B, and C, representing the tire's resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor labo ratory test wheel. Sus-tained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades B and A represent lev-els of performance on the laboratory test wheel that exceed the minimum required by law.The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either sep-arately or in combinat ion, can cause heat buildup and possible tire failure.<RSC - run-flat tiresYou will recognize run-flat tires by a circular symbol containing the letters RSC on the side of the tire, page207.M+SWinter and all-season tires. These have better winter properties than sum-mer tires.XLDesignation for specia lly reinforced tires.For instance:Manufacturer's codefor tire maketire size and tire designTire ageDOT xxxx xxx 0312
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