Tire Identification Number; Uniform Tire Quality Grading; Tire Identification Marks; Tire Size - BMW X3 Owner's Manual

Mobility
35i

Tire size

Specifications in
bar/PSI with cold
tires
245/50 R 18 100 V
M+S A/S RSC
245/50 R 18 100 H
M+S RSC
245/45 R 19 102 V
M+S XL A/S RSC
245/45 R 19 102 V
M+S RSC
Front: 245/45 R 19
98 W RSC
Rear:
275/40 R 19 101 W
RSC
Front: 245/40 R 20
99 Y XL RSC
Rear:
275/35 R 20 102 Y
XL RSC
Compact wheel
T 135/80 R 18 104
M

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
158
Wheels and tires
Pressure specifications
in bar/PSI
2.6 / 38 3.0 / 44
2.8 / 41 3.2 / 46
2.4 / 35 -
- 2.8 / 41
2.4 / 35 -
- 2.8 / 41
Speed up to a max. of
50 mph / 80 km/h
4.2 / 60
Online Edition for Part no. 01 40 2 903 813 - 07 12 490
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.