Chevrolet Spark EV 2014 Owner's Manual page 270

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 digits represent the
week (01-52) and the last
two digits, the year. For
example, the third week of
the year 2010 would have a
four-digit DOT date of 0310.
The letters and numbers
following the DOT code are
the Tire Identification Number
(TIN). The TIN shows the
manufacturer and plant code,
tire size, and date the tire was
manufactured. The TIN is
molded onto both sides of the
tire, although only one side may
have the date of manufacture.
of cord and number of plies in
the sidewall and under the tread.
Tire
manufacturers are required to
grade tires based on three
performance factors: treadwear,
traction, and temperature
resistance. For more information
see
Maximum load
that can be carried and the
maximum pressure needed to
support that load.
The type
.