||215/45R17 87W is the size
designation and service description (load
index and speed symbol).
||RADIAL must be branded on
any tyre of radial construction.
||A tyre must be branded either
tubeless or tubetype.
||The Yokohama Rubber Co., Ltd.
is branded to identify the manufacturer.
||Made in Japan is branded to
identify the country of manufacture (origin),
||Maximum permissible inflation
pressure and load rating required by regulations
of North America. For reference to other
||DOT and/or E4 are symbols
certifying YOKOHAMA'S compliance with the
Department of Transportation (USA) and/or
Economic Commission for Europe (ECE) safety
||FDOK NFB089 is
YOKOHAMA'S tyre identification [serial]
number. The last four digits identify the
week and year of manufacture. (Example:0208
means second week of 2008 ; 3709 means thirty-seventh
week of 2009). Other characters refe rto
coding of size/type and plant of manufacture.
||The generic name of each cord
material used in the plies (both sidewall
and tread area), and actual number of plies
in the sidewall, and in the tread area if
different. These are North American regulations.
||For the USA only,
the Federal Government Uniform Tire Quality
Grading. Standard (UTQG) applies to passenger
tyres (but excludes deep tread, winter type
snow tyres, temporary use spare tyres, and
tyres with nominal rim diameters of twelve
inches or less). Tyres subject to the standard
are required to be graded on the performance
factors of treadwear, traction and temperature.
The treadwear grade is a comparative rating
based on the wear rate of the tyre when
tested under controlled conditions. A tyre
graded 150 would wear one and a half times
as well under the same controlled conditions
as a tyre graded 100. The relative performance
of tyres depends upon 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 road characteristics and climate.
The traction grades, from highest to lowest,
are A, B, andC, and they represent the tyre's
ability to stop on wet pavement as measured
under controlled conditions and surfaces.
A tyre marked C may have poor traction performance.
The traction grade 'assigned is based on
braking (straight ahead) traction tests
and does not include cornering (turning)
The temperature grades are A (the highest),
B, and C, representing the tyre's resistance
to the generation of heat and its ability
to dissipate heat when tested under controlled
indoor conditions. Sustained high temperatures
can cause the tyre materials to degenerate
and reduce tyre life. Excessive temperatures
can lead to sudden tyre failure.
indicates locations of tread wear indicators.
The tyre is recommended to be replaced when
the remaining tread has worn to this point.
The indicators are placed across the tread
at six locations around the tyre marked
by the triangular symbol.