International Tire Approval Marks; Uniform Tire Quality Grading - Lucid Air Owner's Manual

International Tire Approval Marks

Before any tires can be sold in most countries,
tire manufacturers must test and certify that all
applicable safety and performance standards
are met. This can include, sidewall branding,
durability, physical dimensions, high-speed
endurance, road noise, and wet traction.
Many tires are sold globally, so tires may be
branded with multiple approval codes from
various countries.
United States
United States Department of
Transportation (DOT)
See 8. U.S DOT tire identification
number (TIN).
China
China Compulsory Certification (CCC)
Mark
China Compulsory Certification mark
for products being exported to or sold
in the Peoples Republic of China.
Europe
United Nations Economic Commission
of Europe (U.N.E.C.E.)
The symbol identifying the United Nations
Economic Commission for Europe (U.N.E.C.E.,
sometimes referred to as E.C.E.) is found on
a tire's sidewall which certifies that the tire
manufacturer meets all regulations, including
the load index and speed symbol appearing in
its service description.
The letter "E" or "e" and number code (in a
circle or rectangle) identifies the country where
the tire was originally registered, followed
Tire & Wheels
by two digits (the Regulation Series) where
the tire was approved (such as "02" for
E.C.E. Regulation 30 governing passenger tires)
followed by digits representing the E.C.E. mark,
type-approval numbers.
Tested tires meeting the "pass-by" noise and
wet traction limits may have another E.C.E.
branding followed by an "-s" and "w" (for
sound and wet traction, respectively). One or
two E.C.E. symbols may appear on the tire's
sidewall.

Uniform Tire Quality Grading

The following information relates to the tire
grading system developed by the National
Highway Traffic Safety Administration (NHTSA),
which will grade tires by tread wear, traction
and temperature performance.
Note: Tires that have deep tread, and
winter tires, are exempt from these marking
requirements.
Quality grades, where applicable, can be found
on the tire sidewall between the tread shoulder
and maximum section width. For example:
TREADWEAR TRACTION
180 AA
In addition to the marking requirements,
passenger car tires must conform to Federal
Safety Requirements.
Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified
government test course.
For example, a tire graded 150 would wear
one and a half times as well on a government
test course as a tire graded 100. The relative
performance of tires depends on the actual
conditions of their use, however, and may
depart significantly from the norm due to
variations in driving habits, service practices,
and differences in both road characteristics
and climate.
Traction
Note: The traction grade assigned to this
tire is based on straight-ahead braking tests,
TEMPERATURE
A
176