Carcass:
The tire structure, except tread and sidewall rubber which, when inflated,
bears the load.
Chunking:
The breaking away of pieces of the tread or sidewall.
Cold inflation pressure:
The pressure in the tire before you drive.
Cord:
The strands forming the plies in the tire.
Cord separation:
The parting of cords from adjacent rubber compounds.
Cracking:
Any parting within the tread, sidewall, or inner liner of the tire
extending to cord material.
CT:
A pneumatic tire with an inverted flange tire and rim system in which the rim
is designed with rim flanges pointed radially inward and the tire is designed to fit
on the underside of the rim in a manner that encloses the rim flanges inside the air
cavity of the tire.
Curb weight:
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.
extra load tire:
A tire designed to operate at higher loads and at higher inflation
pressures than the corresponding standard tire.
Groove:
The space between two adjacent tread ribs.
Inner liner:
The layer(s) forming the inside surface of a tubeless tire that contains
the inflating medium within the tire.
Inner-liner separation:
The parting of the inner liner from cord material in the
carcass.
Intended outboard sidewall The sidewall that contains a white-wall, bears white
lettering or bears manufacturer, brand, and/or model name molding that is higher or
deeper than the same molding on the other sidewall of the tire or the outward facing
sidewall of an asymmetrical tire that has a particular side that must always face
outward when mounted on a vehicle.
light truck (lT) tire:
A tire designated by its manufacturer as primarily intended
for use on lightweight trucks or multipurpose passenger vehicles.
load rating:
The maximum load that a tire is rated to carry for a given inflation
pressure.
Maximum load rating:
The load rating for a tire at the maximum permissible
inflation pressure for that tire.
Maximum permissible inflation pressure:
The maximum cold inflation pressure
to which a tire may be inflated.
Maximum loaded vehicle weight:
The sum of curb weight, accessory weight,
vehicle capacity weight, and production options weight.
Measuring rim:
The rim on which a tire is fitted for physical dimension
requirements.
Non-pneumatic rim:
A mechanical device which, when a non-pneumatic tire
assembly incorporates a wheel, supports the tire, and attaches, either integrally or
separably, to the wheel center member and upon which the tire is attached.
Non-pneumatic spare tire assembly:
A non-pneumatic tire assembly intended
for temporary use in place of one of the pneumatic tires and rims that are fitted to a
passenger car in compliance with the requirements of this standard.
Non-pneumatic tire:
A mechanical device which transmits, either directly or
through a wheel or wheel center member, the vertical load and tractive forces from
