Bmw 2013 3 Series Bedienungsanleitung PDF herunterladen (Seite 182)

Tire size Pressure specifications

in bar/PSI

Front: 225/35 R 20

90 Y XL RSC

Rear: 255/30 R 20

92 Y XL RSC

2.9 /42

3.4 / 49

Compact wheel

T 135/80 R 17 103

Speed up to a max. of

50 mph / 80 km/h

4.2 / 60

Tire identification marks

Tire size

245/45 R 18 96 Y

245: nominal width in mm

45: aspect ratio in %

R: radial tire code

18: rim diameter in inches

96: load rating, not for ZR tires

Y: speed rating, before the R on ZR tires

Speed letter

T = up to 118 mph, 190 km/h

H = up to 131 mph, 210 km/h

V = up to 150 mph, 240 km/h

W = up to 167 mph, 270 km/h

Y = up to 186 mph, 300 km/h

Tire Identification Number

DOT code: DOT xxxx xxx 3510

xxxx: manufacturer code for the tire brand

xxx: tire size and tire design

3510: tire age

Tires with DOT codes meet the guidelines of the

U.S. Department of Transportation.

Tire age

DOT … 3510: the tire was manufactured in the

35th week in 2010.

Recommendation

Regardless of wear, replace tires at least every

6 years.

Uniform Tire Quality Grading

Quality grades can be found where applicable

on the tire sidewall between tread shoulder and

maximum section width.

For example: Treadwear 200; Traction AA;

Temperature A

DOT Quality Grades

Treadwear

Traction AA A B C

Temperature A B C

All passenger car tires must conform to Federal

Safety Requirements in addition to these

grades.

Treadwear

The treadwear 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 g, 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, however,

and may depart significantly from the norm due

to variations in driving habits, service practices

and differences in road characteristics and cli‐

mate.

Traction

The 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 surfa‐

Seite 182

Mobility Wheels and tires

182

Online Edition for Part no. 01 40 2 903 880 - 07 12 490

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