Tire Designations - Chevrolet Tahoe 2015 Owner's Manual

10-50 Vehicle Care
(7) Maximum Cold Inflation
Load Limit Maximum load that
:
can be carried and the
maximum pressure needed to
support that load. For
information on recommended
tire pressure see Tire Pressure
on page 10-53 and Vehicle Load
Limits on page 9-15.
(8) Temporary Use Only
use a temporary spare tire until
the road tire is repaired and
replaced. This spare tire should
not be driven on over 112 km/h
(70 mph), or 88 km/h (55 mph)
when pulling a trailer, with the
proper inflation pressure. See
Full-Size Spare Tire on
page 10-78.

Tire Designations

Tire Size
The example shows a typical
passenger vehicle tire size.
Passenger (P-Metric) Tire
(1) Passenger (P-Metric)
Tire The United States version
:
of a metric tire sizing system.
Only
:
The letter P as the first
character in the tire size means
a passenger vehicle tire
engineered to standards set by
the U.S. Tire and Rim
Association.
(2) Tire Width
number indicates the tire section
width in millimeters from
sidewall to sidewall.
(3) Aspect Ratio
number that indicates the tire
height-to-width measurements.
For example, if the tire size
aspect ratio is 75, as shown in
The three-digit
:
A two-digit
:
item C of the tire illustration, it
would mean that the tire's
sidewall is 75 percent as high as
it is wide.
(4) Construction Code
letter code is used to indicate
the type of ply construction in
the tire. The letter R means
radial ply construction; the
letter D means diagonal or bias
ply construction; and the letter B
means belted-bias ply
construction.
(5) Rim Diameter Diameter of
:
the wheel in inches.
(6) Service Description
These characters represent the
load index and speed rating of
the tire. The load index
represents the load carrying
capacity a tire is certified to
carry. The speed rating is the
maximum speed a tire is
certified to carry a load.
A
:
: