Tire Labeling; Sizes - SMART fortwo coupé Operator's Manual

Tires and wheels
138
sudden tire failure. The grade C
corresponds to a level of performance
which all passenger car tires must meet
under the Federal Motor Vehicle Safety
Standard No. 109. Grades B and A represent
higher levels of performance on the
laboratory test wheel than the minimum
required by law.
Rotating tires
G
Warning!
Do not rotate front and rear wheels as they
have different dimensions, e.g. rim size,
wheel offset etc. Otherwise, the handling
can be affected and you could endanger
yourself and others.
Thoroughly clean the mounting face of the
wheels and brake discs, i.e. the inner side
of the wheels/tires each time the wheels/
tires are changed. Check for and ensure
proper tire inflation pressure.
G
Warning!
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
81 lb‑ft (110 Nm).
Only use genuine smart wheel bolts
specified for your vehicle's rims.
For information on wheel change, see "Flat
Y
tire" ( page 188).

Tire labeling

Besides tire name (sales designation) and
manufacturer name, a number of markings
can be found on a tire.
Following are some explanations for the
markings on your vehicle's tires:
Uniform Quality Grading Standards
:
Y
( page 137)
DOT, Tire Identification Number (TIN)
;
Y
( page 141)
Maximum tire load (
=
Maximum tire inflation pressure
?
Y
( page 131)
Manufacturer
A
Tire ply material (
B
Tire size designation, load and speed
C
Y
rating ( page 139)
Load identification (
D
Tire name
E
i
For illustration purposes only. Actual
data on tires are specific to each vehicle
and may vary from data shown in above
illustration.
For more information, see "Rims and
Y
tires" ( page 217).
Y
page 135)
Y
page 142)
Y
page 141)