BMW Z3 COUPE, Manual

Page: 114 / 198

114 n
Wheel and tire combinations
The right choice
Use only tires which have been ap-
proved by BMW. Refer to the informa-
tion beginning on page
116 .
Because of the potential high speeds
which this vehicle can reach, the use of
specific brands, specifications and di-
mensions 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 and ASC+T/DSC
*
. The function
of these systems is impaired if improper
wheel-tire combinations are used.
For this reason, use only tires made by
the same manufacturer which have the
same tread configuration. If you must
deviate from this (following a flat tire, for
instance), restore 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:
S = up to 112 mph (180 km/h)
T = up to 118 mph (190 km/h)
H = up to 130 mph (210 km/h)
V = up to 149 mph (240 km/h)
W = up to 167 mph (270 km/h)
Y = up to 186 mph (300 km/h)
ZR = over 149 mph (240 km/h)
Example:
Nominal width
in mm
Aspect ratio in %
Belt rating ID code
for radial tires
Wheel diameter in inches
Load rating
(not on ZR tires)
Speed rating
(before R on ZR tires)
205/60 R 15 91 H
All-Season and winter 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 valve inserts against dirt by
using valve 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
7 x 15 H 2 J