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Tire inForMaTion
Tire Terminology glossary
accessory weight means
•
automatic transmission, power steering, power brakes,
power windows, power seats, radio, and heater, to the extent
that these items are available as factory-installed equipment.
•
carcass means
- the tire structure except for the tread
which provides the major portion of the tire's capability
to deflect in response to the vertical loads and tractive
forces that the tire transmits from the roadway to the non-
pneumatic rim, the wheel center member, or the vehicle
and which attaches to the vehicle or attaches, either
integrally or separably, to the wheel center member or
non-pneumatic rim.
•
carcass separation means
from the non-pneumatic rim or wheel center member.
•
chunking means
- the breaking away of pieces of the
carcass or tread.
•
cracking means
- any parting within the carcass, tread, or
any components that connect the tire to the wheel center
member.
•
curb weight means
- the weight of a motor vehicle with
standard equipment including the maximum capacity of
fuel, oil, and coolant, and, if so equipped, air conditioning
and additional weight optional engine.
•
load rating means
- the maximum load a tire is rated to carry.
•
Maximum loaded vehicle weight means
a.
Curb weight;
b.
Accessory weight;
Section width
Tire ply
composition
and materials
used
Maximum
permissible
inflation
pressure
Maximum
load rating
reV 07f, 09b, 09g
SKU 42709
- the combined weight of
- the pulling away of the carcass
- the sum of:
inner diameter
in inches
in inches
Trailer
tire
For technical questions, please call 1-800-444-3353.
c.
Vehicle capacity weight; and
d.
Production options weight.
•
Maximum tire width means
distance between the exterior edges of the carcass or the
linear distance between the exterior edges of the tread, both
being measured parallel to the rolling axis of the tire.
•
normal occupant weight means
number of occupants.
•
occupant distribution means
in a vehicle.
•
production options weight means
of those installed regular production options weighing over
2.3 kilograms in excess of those standard items which
they replace, not previously considered in curb weight
or accessory weight, including heavy duty brakes, ride
levelers, roof rack, heavy duty battery, and special trim.
•
Tread means
contact with the road.
•
Tread separation means
the carcass.
•
Vehicle capacity weight means
luggage load plus 68 kilograms times the vehicle's
designated seating capacity.
•
Vehicle maximum load on the tire means
an individual tire that is determined by distributing to each
axle its share of the maximum loaded vehicle weight and
dividing by two.
•
Vehicle normal load on the tire means
individual tire that is determined by distributing to each
axle its share of the curb weight, accessory weight, and
normal occupant weight and dividing by 2.
Tire Markings
- the greater of either the linear
- 68 kilograms times the
- distribution of occupants
- that portion of the tire that comes in
- pulling away of the tread from
- the rated cargo and
load index and
Speed rating*
european tire
certificate*
u.S. doT tire
identification
number
*information not required by u.S. doT
- the combined weight
- that load on
- that load on an
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