Buick 2014 Regal Owner's Manual page 289

Use only radial ply tires of the
same size, load range, and
speed rating as the original
equipment tires.
Winter tires with the same speed
rating as the original equipment tires
may not be available for H, V, W, Y,
and ZR speed rated tires. If winter
tires with a lower speed rating are
chosen, never exceed the tire's
maximum speed capability.
This vehicle may come with high
performance summer tires. These
tires have a special tread and
compound that are optimized for
maximum dry and wet road
performance. This special tread
and compound will decrease
performance in cold climates, and
on ice and snow. We recommend
installing winter tires on the
vehicle if frequent driving in cold
temperatures or on snow or ice
covered roads is expected. See
Useful information about a
tire is molded into its sidewall.
The examples show a typical
passenger vehicle tire and a
compact spare tire sidewall.
combination of letters and
numbers used to define a
particular tire's width, height,
aspect ratio, construction type,
.
The tire size is a
and service description. See the
Tire Size illustration later in this
section.
Original
equipment tires designed to
GM's specific tire performance
criteria have a TPC specification
code molded onto the sidewall.
GM's TPC specifications meet or
exceed all federal safety
guidelines.
The
Department of Transportation
(DOT) code indicates that
the tire is in compliance
with the U.S. Department of
Transportation Motor Vehicle
Safety Standards.
The last four
digits of the TIN indicate the tire
manufactured date. The first two