BMW 228i Owner's Manual Page 170

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Tire size Pressure specifications in
bar/PSI
Specifications in
bar/PSI with cold
tires
205/50 R 17 89 H
M+S RSC
225/45 R 17 91 H
M+S RSC
225/40 R 18 92 V
M+S XL RSC
2.7 / 39 3.1 / 45
Front: 225/40 R
18 88 Y Std
Rear: 245/35 R
18 92 Y Std
2.5 / 36
-
-
2.9 / 42
Front: 225/40
R 18 88 Y RSC
Rear: 245/35
R 18 88 Y RSC
2.5 / 36
-
-
2.9 / 42
Front: 225/35
R 19 88 Y XL
RSC
Rear: 245/30
R 19 89 Y XL
RSC
2.9 /42
-
-
3.2/ 46
Compact wheel
T 125/80 R 17 99
M
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
Q = up to 100 mph, 160 km/h
R = up to 106 mph, 170 km/h
S = up to 112 mph, 180 km/h
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 1013
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
1013: tire age
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
Tire age
DOT … 1013: the tire was manufactured in the
10th week 2013.
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
Seite 170
Mobility Wheels and tires
170
Online Edition for Part no. 01 40 2 924 974 - X/13
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