Glossary Of Tire Terminology - Subaru Ascent 2023 Manual

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Tire information
& Glossary of tire terminology
Accessory weight
.
The combined weight (in excess of
those standard items which may be
replaced) of automatic transmis-
sion, power steering, power brakes,
power windows, power seats, radio,
and heater, to the extent that these
items are available as factory-in-
stalled equipment (whether in-
stalled or not).
Bead
.
The part of the tire that is made of
steel wires, wrapped or reinforced
by ply cords and that is shaped to fit
the rim.
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, when in-
flated, bears the load.
Chunking
.
The breaking away of pieces of the
tread or sidewall.
Cold tire pressure
.
The pressure in a tire that has been
driven less than 1 mile or has been
standing for three hours or more.
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, side-
wall, or inner liner of the tire
extending to cord material.
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 higher inflation pressure
than the corresponding standard
tire.
Groove
.
The space between two adjacent
tread ribs.
Innerliner
.
The layer(s) forming the inside sur-
face of a tubeless tire that contains
the inflating medium within the tire.
Innerliner separation
.
The parting of the innerliner from
cord material in the carcass.
Intended outboard sidewall
.
The sidewall that contains a
(1)
whitewall, bears white letter-
ing or bears manufacturer,
brand, and/or model name
molding that is higher or
deeper than the same mold-
ing on the other sidewall of
the tire, or
The outward facing sidewall
(2)
of an asymmetrical tire that
has a particular side that