2011 1 Series Owner's Manual without iDrive - Irvine BMW

Wheels and tiresTire identification marksKnowledge of the labeling on the side of the tiremakes it easier to identify and choose the righttires.Tire sizee.g.225/45 R 17 91 VNominal width in mmAspect ratio in ΞRadial belt constructionRim diameter in inchesLoad rating,not on ZR tiresSpeed code letter, infront of the R on ZR tiresSpeed 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 ofthe US Department of Transportation.DOT code:e.g.DOT xxxx xxx 1010Manufacturer'scode for tire makeTire size andtire designTire ageTire ageThe manufacturing date of tires is contained inthe tire coding: DOT … 1010 means that thetire was manufactured in week 10 of 2010.BMW recommends that you replace all tiresafter 6 years at most, even if some tires may lastfor 10 years.Uniform Tire Quality GradingQuality grades can be found where applicableon the tire sidewall between tread shoulder andmaximum section width. For example:Tread wear 200 Traction AATemperature ADOT Quality GradesTread wearTraction AA A B CTemperature A B CAll passenger car tires must conform toFederal Safety Requirements in additionto these grades.