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Manufacturer
A
Tire ply material (
B
Y
Tire size designation, load and speed
C
rating (
page 137)
Y
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
tires" (
page 216).
Y
Tire size designation, load and speed
rating
Tire width
:
Aspect ratio in %
;
Radial tire code
=
Rim diameter
?
Tire load rating
A
Tire speed rating
B
i
For information purposes only. Actual
data on tires are specific to each vehicle
and may vary from data shown in above
illustration.
General:
Depending on the design standards used,
the tire size molded into the sidewall may
have no letter or a letter preceding the tire
size designation.
No letter preceding the size designation
(as illustrated above): Passenger car tire
page 140)
based on European design standards.
Letter "P" preceding the size designation:
Passenger car tire based on U.S. design
page 139)
Y
standards.
Letter "LT" preceding the size
designation: Light Truck tire based on U.S.
design standards.
Letter "T" preceding the size designation:
Temporary spare tires which are high
pressure compact spares designed for
temporary emergency use only.
Tire width
Tire width : indicates the nominal tire
width in mm.
Aspect ratio
Aspect ratio ; is the dimensional
relationship between tire section height
and section width and is expressed as a
percentage. The aspect ratio is arrived at
by dividing section height by section
width.
Tire code
Tire code = indicates the tire
construction type. The "R" stands for radial
tire type. Letter "D" means diagonal or
bias ply construction; letter "B" means
belted-bias ply construction.
At the tire manufacturer's option, any tire
with a speed capability above 149 mph
(240 km/h) can include a "ZR" in the size
designation (for example: 245/40 ZR 18).
For additional information, see "Tire
speed rating" (
Rim diameter
Rim diameter ? is the diameter of the
bead seat, not the diameter of the rim edge.
Rim diameter is indicated in inches (in).
Tires and wheels
page 138).
Y
137
Z

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