BMW serie 7 1999 Manual Do Utilizador

134

Wheel and tire combinations

The right choice

Use only tires approved by BMW. Refer
to page

Because of the high speeds this vehicle
can reach, the use of specific tire
brands, specifications and dimensions
is mandatory. Consult any BMW center
for details.
Comply with national, state, or provin-
cial regulations.

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

as ABS, ATC, ASC+T/DSC. The func-
tion of these systems is impaired if im-
proper 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 if you have mounted
winter tires, 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.

Codes on radial tires:

The speed rating indicates the ap-
proved 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 149 mph (240 km/h)

= up to 167 mph (270 km/h)

ZR = over 149 mph (240 km/h)

For example

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

235/60 R 16 100W

Winter tires:

Q M+S

up to 100 mph (160 km/h)

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 valve inserts against dirt using
screw-on valve stem caps. Dirt in the
valves frequently leads to slow leaks.

For 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

71/2

x 16 H 2