Tire Identification Marks; Maximum Tire Load; Speed Letter; Tire Identification Number - BMW X5 Owner's Manual

MOBILITY
Tire size Pressure specifications
in bar/PSI
Specifications in
bar/PSI with
cold tires
265/50 R 19 2.5 / 36
110 H M+S XL
RSC
275/45 R 20 2.8 / 41
110 V M+S XL
RSC
Front: 275/45 R 2.8 / 41
20 110 Y XL
RSC
Rear: 305/40 R -
20 112 Y XL
RSC
Front: 275/40 R 2.8 / 41
21 107 Y XL
RSC
Rear: 315/35 R -
21 111 Y XL
RSC
Front: 275/35 R 3.0 / 44
22 104 Y XL Std
Rear: 315/30 R -
22 107 Y XL Std
Emergency Speed up to a max. of
wheel: 50 mph / 80 km/h
T 155/80 R 19 4.2 / 60
114 M

Tire identification marks

Tire size
245/45 R 18 96 Y
245: nominal width in mm
338
Wheels and tires
3.0 / 44
3.3 / 48
-
3.1 / 45
-
3.1 / 45
-
3.4 / 49
Online Edition for Part no. 01402896765 - X/18
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

Maximum tire load

Maximum tire load is the maximum permissible
weight for which the tire is approved.
Locate the maximum tire load on the tire sidewall
and the Gross Axle Weight Rating – GAWR – on
the certification label on the driver door B-pillar.
Divide the tire load by 1.1. It must be greater
than one-half of the vehicle's Gross Axle Weight
Rating – GAWR. Note, front vs. rear GAWR and
tire loads, respectively.

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 3818
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
3818: tire age
Tires with DOT codes meet the guidelines of the
U.S. Department of Transportation.
Tire age
Recommendation
Regardless of the tire tread, replace tires at least
every 6 years.