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SKU 02948 For technical questions, please call 1-800-444-3353. Page 14
TIRE INFORMATION
Tire Terminology Glossary
Accessory weight means- the combined weight of 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- the pulling away of the carcass 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- the sum of:
Curb weight;
Accessory weight;
Vehicle capacity weight; and
Production options weight.
Maximum tire width means- the greater of either the linear 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- 68 kilograms times the number of occupants.
Occupant distribution means- distribution of occupants in a vehicle.
Production options weight means- the combined weight of those installed regular production options
weighing over 2.3 kilograms in excess of those standard items which they replace, not previously con-
sidered in curb weight or accessory weight, including heavy duty brakes, ride levelers, roof rack, heavy
duty battery, and special trim.
Tread means- that portion of the tire that comes in contact with the road.
Tread separation means- pulling away of the tread from the carcass.
Vehicle capacity weight means- the rated cargo and luggage load plus 68 kilograms times the vehicle’s
designated seating capacity.
Vehicle maximum load on the tire means- that load on an individual tire that is determined by distribut-
ing to each axle its share of the maximum loaded vehicle weight and dividing by two.
Vehicle normal load on the tire means- that load on an 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.
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