Black plate (60,1)
GMC Sierra Owner Manual - 2011
10-60
Vehicle Care
Radial Ply Tire
:
A pneumatic
tire in which the ply cords that
extend to the beads are laid at
90 degrees to the centerline of
the tread.
Rim
:
A metal support for a tire
and upon which the tire beads
are seated.
Sidewall
:
The portion of a tire
between the tread and the bead.
Speed Rating
:
An
alphanumeric code assigned to
a tire indicating the maximum
speed at which a tire can
operate.
Traction
:
The friction between
the tire and the road surface.
The amount of grip provided.
Tread
:
The portion of a tire that
comes into contact with
the road.
Treadwear Indicators
:
Narrow
bands, sometimes called wear
bars, that show across the tread
of a tire when only 1.6 mm
(1/16 inch) of tread remains.
See
When It Is Time for New
Tires on page 10
‑
70
.
UTQGS (Uniform Tire Quality
Grading Standards)
:
A tire
information system that
provides consumers with
ratings for a tire's traction,
temperature, and treadwear.
Ratings are determined by
tire manufacturers using
government testing procedures.
The ratings are molded into the
sidewall of the tire. See
Uniform
Tire Quality Grading on
page 10
‑
74
.
Vehicle Capacity Weight
:
The
number of designated seating
positions multiplied by
68 kg (150 lbs) plus the rated
cargo load. See
Vehicle Load
Limits on page 9
‑
23
.
Vehicle Maximum Load on the
Tire
:
Load on an individual tire
due to curb weight, accessory
weight, occupant weight, and
cargo weight.
Vehicle Placard
:
A label
permanently attached to a
vehicle showing the vehicle's
capacity weight and the original
equipment tire size and
recommended inflation pressure.
See
“
Tire and Loading
Information Label
”
under
Vehicle
Load Limits on page 9
‑
23
.
