BMW M4 F82 F84 Coupe M Power owners manual page 178

text version of content this owner's manual page from owners manual to the vehicle BMW M4, year of production 2014:

Seite 174 Mobility Wheels and tires 45: aspect ratio in % DOT Quality Grades R: radial tire code Treadwear 18: rim diameter in inches Traction AA A B C 96: load rating, not for ZR tires Temperature A B C Y: speed rating, before the R on ZR tires All passenger car tires must conform to Fed‐ eral Safety Requirements in addition to these Speed letter grades. Q = up to 100 mph, 160 km/h Treadwear R = up to 106 mph, 170 km/h The treadwear grade is a comparative rating S = up to 112 mph, 180 km/h based on the wear rate of the tire when tested T = up to 118 mph, 190 km/h under controlled conditions on a specified gov‐ H = up to 131 mph, 210 km/h ernment test course. For example, a tire graded 150 would wear one and one-half, 1 g, V = up to 150 mph, 240 km/h times as well on the government course as a W = up to 167 mph, 270 km/h tire graded 100. The relative performance of Y = up to 186 mph, 300 km/h tires depends upon the actual conditions of their use, however, and may depart signifi‐ Tire Identification Number cantly from the norm due to variations in driv‐ ing habits, service practices and differences in DOT code: DOT xxxx xxx 0115 road characteristics and climate. xxxx: manufacturer code for the tire brand xxx: tire size and tire design Traction 0115: tire age The traction grades, from highest to lowest, Tires with DOT codes meet the guidelines ofare AA, A, B, and C. the U.S. Department of Transportation. Those grades represent the tire's ability to stop on wet pavement as measured under Tire age controlled conditions on specified government DOT … 0115: the tire was manufactured in thetest surfaces of asphalt and concrete. A tire 1st week of 2015. marked C may have poor traction performance. The traction grade assigned to this tire is Recommendation based on straight-ahead braking traction tests, Regardless of wear and tear, replace tires atand does not include acceleration, cornering, least every 6 years. hydroplaning, or peak traction characteristics. Uniform Tire Quality Grading Temperature Quality grades can be found where applicableThe temperature grades are A, the highest, B, on the tire sidewall between tread shoulderand C, representing the tire's resistance to the and maximum section width. generation of heat and its ability to dissipate heat when tested under controlled conditions For example: Treadwear 200; Traction AA; on a specified indoor laboratory test wheel. Temperature A Sustained high temperature can cause the ma‐ terial of the tire to degenerate and reduce tire life, and excessive temperature can lead to 174 Online Edition for Part no. 01 40 2 960 786 - II/15

owners manual BMW M4

owners manual BMW M4 - year of production: 2014 - BMW M4 F82 F84 Coupe M Power owners manual EN