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Tire size Pressure specifications
in bar/PSI
Specifications in
bar/PSI with cold
tires
255/55 R 18 109 H
M+S XL A/S RSC
255/55 R 18 109 H
M+S XL RSC
2.5 / 36 3.0 / 44
255/50 R 19 107 H
M+S XL A/S RSC
255/50 R 19 107 H
M+S XL RSC
2.7 / 39 3.2 / 46
Front: 275/40 R 20
106 W XL RSC
Rear: 315/35 R 20
110 W XL RSC
2.7 / 39
-
-
3.0 / 44
Front: 275/40 R 20
106 V M+S XL RSC
Rear: 315/35 R 20
110 V M+S XL RSC
2.7 / 39
-
-
3.0 / 44
Front: 285/35 R 21
105 W XL RSC
Rear: 325/30 R 21
108 W XL RSC
2.7 / 39
-
-
3.2 / 46
With Sport Package
Tire size Pressure specifications
in bar/PSI
Specifications in
bar/PSI with cold
tires
255/55 R 18 109 H
M+S XL RSC
255/50 R 19 107 H
M+S XL RSC
2.9 /42 3.4 / 49
Tire size Pressure specifications
in bar/PSI
Front: 275/40 R 20
106 W XL RSC
Rear: 315/35 R 20
110 W XL RSC
2.9 /42
-
-
3.4 / 49
Front: 275/40 R 20
106 V M+S XL RSC
Rear: 315/35 R 20
110 V M+S XL RSC
2.9 /42
-
-
3.4 / 49
Front: 285/35 R 21
105 W XL RSC
Rear: 325/30 R 21
108 W XL RSC
2.9 /42
-
-
3.2/ 46
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
Seite 216
Mobility Wheels and tires
216
Online Edition for Part no. 01 40 2 926 740 - X/13
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