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TIN (Tire Identification Number)
Unique identifier which facilitates efforts by tire
manufacturers to notify purchasers in recall situations
or other safety matters concerning tires and gives
purchases the means to easily identify such tires. The
TIN is comprised of "Manufacturer’s identification
mark", "Tire size", "Tire type code" and "Date of
manufacture".
Tire Load Rating
Numerical code associated with the maximum load a
tire can support.
Tire Ply Composition and Material used
This indicates the number of plies or the number of
layers of rubber-coated fabric in the tire tread and
sidewall. Tire manufacturers also must indicate the ply
materials in the tire and sidewall, which include steel,
nylon, polyester, and others.
Tire Speed Rating
Part of tire designation; indicates the speed range for
which a tire is approved.
Traction
Force exerted by the vehicle on the road via the tires.
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 1/16 in (1.6
mm) of tread remains.
TWR (Tongue Weight Rating)
Maximum permissible weight on trailer tongue.
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.