Wheel and tire combinations, Wheel and tire, Combinations – BMW 2006 bmw 325i User Manual

Page 128

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Wheel and tire combinations

The right choice

Use only BMW-approved tires. Refer to
page

Due to the high speeds this vehicle can
reach, the use of specific brands, spec-
ifications and sizes is mandatory.
Consult any BMW center for details.
Comply with local/national regulations.

The correct wheel-tire combina-
tion affects different systems such

as ABS, ATC and ASC+T/DSC. The
function of these systems is impaired if
improper wheel-tire combinations are
used.
For this reason, use only tires of the
same brand and tread pattern. In the
event of a flat tire, for example, remount
the approved wheel-tire combination as
soon as possible.

Codes on tires and wheels

The tire codes will aid you in selecting
the correct tire.

The codes on radial tires:

The speed rating indicates the approved
maximum speed for the tire.

Summer tires:

= up to 112 mph (180 km/h)

= up to 118 mph (190 km/h)

= up to 130 mph (210 km/h)

= up to 150 mph (240 km/h)

W = up to 167 mph (270 km/h)
Y

= up to 187 mph (300 km/h)

ZR = above 150 mph (240 km/h)

Example:

Nominal width
in mm
Aspect ratio in %
Radial tire ID code
Rim diameter in inches
Load rating
(not on ZR tires)
Speed rating
(before R on ZR tires)

205/60 R

5 91 W

Winter tires and all-season tires:

Q M+S = up to 100 mph (160 km/h)
T M+S = up to 118 mph (190 km/h)
H M+S = up to 130 mph (210 km/h)

Codes stamped on light-alloy wheels:

Protect tire valve from dirt by using
screw-on valve stem caps. Dirt in the
valves frequently leads to slow leaks.

Example:

Rim width
in inches
Code letter for
flange type
Symbol for full-drop
center rim
Rim diameter in inches
Hump on the 2 rim shoulders

x 15

H 2