Tesla X 2015 Owner's Manual page 214

Wheels and Tires
Vehicle normal load on the
tire
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 The parting of the inner liner from cord material in the carcass.
separation
Load rating The maximum load that a tire is rated to carry for a given inflation pressure.
Maximum load The load rating for a tire at the maximum permissible inflation pressure for that tire.
rating
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.
Overall width The linear distance between the exteriors of the sidewalls of an inflated tire, including
elevations due to labeling, decorations, or protective bands or ribs.
Ply A layer of rubber-coated parallel cords.
Ply separation A parting of rubber compound between adjacent plies.
Pneumatic tire A mechanical device made of rubber, chemicals, fabric and steel or other materials, that,
when mounted on an automotive wheel, provides the traction and contains the gas or fluid
that sustains the load.
Radial ply tire A pneumatic tire in which the ply cords that extend to the beads are laid at substantially 90
degrees to the center line of the tread.
Reinforced tire A tire designed to operate at higher loads and at higher inflation pressures than the
corresponding standard tire.
Section width The linear distance between the exteriors of the sidewalls of an inflated tire, excluding
elevations due to labeling, decoration, or protective bands.
Sidewall The portion of a tire between the tread and bead.
Sidewall separation The parting of the rubber compound from the cord material in the sidewall.
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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.
MODEL X Owner's Manual