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Rim diameter Nominal diameter of the bead seat.
Rim size designation Rim diameter and width.
Rim type designation The manufacturing industry's designation for a rim by style or
code.
Rim width Nominal distance between the rim's flanges.
Vehicle maximum load on the
tire
Load on 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 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 two.
Pneumatic Radial Tire Definitions
Bead separation A breakdown of the bond between components in the bead.
Bias ply tire A pneumatic tire in which the ply cords that extend to the
beads are laid at alternate angles substantially less than 90
degrees to the center line of the tread.
Carcass The tire structure, except tread and sidewall rubber which, that
when inflated, bears the load.
Chunking The breaking away of pieces of the tread or sidewall.
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.
Extra load tire A tire designed to operate at higher loads and higher inflation
pressure 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.
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.
Measuring rim The rim on which a tire is fitted for physical dimension
requirements.
Open splice Any parting at any junction of tread, sidewall, or inner liner that
extends to the cord material.
Outer diameter The overall diameter of an inflated new tire.
Wheels and Tires
190 Model X Owner's Manual
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