BMW Z4 E85 E86 owners manual page 80

text version of content this owner's manual page from owners manual to the vehicle BMW Z4 E85 E86, year of production 2002 - 2008:

Temperature moderate speeds and with only small The temperature grades are A, the highest, amounts of water on the road. B and C, representing the tire’s resistance At tread depths below approx. 1/6 in/ to the generation of heat and its ability to 4 mm, winter tires display a perceptible dissipate heat when tested under con-decrease in their ability to cope with winter trolled conditions on a specified indoor lab-driving conditions, and should be replaced oratory test wheel. in the interest of safety. Sustained 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 Wheels and tiresStandard No. 109. Grades B and A repre- sent higher levels of performance on the laboratory test wheel than the minimum required by law. Tread wear indicators in the tread-groove The temperature grade for this tire is base, see arrow, are distributed around the established for a tire that is properly wheel circumference and are labeled on inflated and not overloaded. Excessive the tire sidewall as TWI, Tread Wear Indica- speed, under-inflation, or excessive load-tor. At a tread depth of 1/16 in/1.6 mm, the ing, either separately or in combination, indicators signal that the legally permissi- can cause heat buildup and possible tire ble wear limit has been reached. failure.< Tire damage RSC: Run Flat tires Unusual vibrations encountered dur- Run Flat tires are labeled on the sidewall ing normal vehicle operation can indi- with a circular symbol containing the letters cate tire failure or some other vehicle mal- RSC. Refer to page 80. function. This type of problem can be caused by contact with curbs, etc. This is M+S also true for irregularities in the vehicle's Winter and all-season tires. handling characteristics, such as a pro- These have better winter performance nounced tendency to pull to the left or right. properties than summer tires. Should this occur, respond by immediately reducing your speed. Proceed carefully to the nearest BMW center or professional tire Tire condition center, or have the vehicle towed there to have it and its wheels or tires inspected. Inspect your tires frequently for tread wear, Tire damage up to and including sudden signs of damage and for foreign objects and complete air loss can pose an extreme lodged in the tread. Check the tread depth.hazard for both vehicle occupants and other road users.< Tire tread Tread depth should not be allowed to go below 1/8 in/3 mm even though in Europe, for example, the legally specified minimum tread depth is only 1/16 in/1.6 mm. Below 1/8 in/3 mm tread depth, there is a very high risk of hydroplaning, even at relatively 78 Online Version for Part No. 01 41 0 157 498 - © 10/03 BMW AG

owners manual BMW Z4 E85 E86

owners manual BMW Z4 E85 E86 - year of production: 2002, 2003, 2004, 2005, 2006, 2007, 2008 - BMW Z4 E85 E86 owners manual EN