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236
Tires and wheels
Groove
means t he space between two adjacent tread
ribs.
Load rating (code)
means t he maximum load that a tire is rated
to carry for a given inflat ion pressu re. You
may not find t his informat ion on all t ires be-
cause it is not required by law.
Maximum load rating
means the load rating for a t ire at the maxi-
mum permissible inflation pressure for that
tire.
Maximum loaded vehicle weight
means t he sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight, and
(d) Prod uction opt ions weight
Maximum (permissible) inflation pressure
means t he maximum cold inflation pressure
to which a tire may be inflated . Also called
"maxim um inflat ion pressu re."
Normal occupant weight
means 150 lbs. (68 kilog rams) times the
number of occupants seated in the vehicle up
to the tota l seating capacity of your vehicle.
Occupant distribution
means dist ribution of occupants in a vehicle.
Outer diameter
means t he overall diamete r of an inflated new
tire.
Overall w idth
means the linear distance between the exter i-
ors of the sidewalls of an inflated t ire, includ-
ing elevations due t o labeli ng, decorations, or
protectiv e bands or ribs.
Ply
means a layer of rubber-coated para llel cords.
Production options weight
means t he combined weight of tho se install ed
regular production opt ions weighing over 5
lbs. (2.3 kg) in excess of those stan dard item s
which they replace, not previously considered
in curb weight or accessory weight, including
heavy duty brakes, ride levelers , roof rack,
heavy duty battery, and special tr im.
Radial ply tire
means a pneumat ic tire in which the ply cords
t hat exte nd t o the beads are laid at substa n-
t ially 90 deg rees to the center line of the
tread .
Recommended inflation pressure
see <=> page 2 35, Cold tire inflation pressure.
Reinforced tire
means a t ire design to operat e at higher loads
and at higher inflation pressures than t he cor-
respondi ng st andard tire. Reinforced tires
may be ident ified as "XL" "xl" "EXTRA LOAD"
'
'
'
or "RF " on the sidewa ll.
Rim
means a metal support for a ti re or a tir e and
tube assembly upon which t he tire bea ds are
seat ed.
Rim diameter
means nom inal diameter of the bead seat. If
you change your wheel size, you will have to
purchase new ti res t o match the new rim di-
ameter.
Rim size designation
means rim diameter and width .
Rim width
means nominal distance between rim flanges .
Sidewall
means t hat port ion of a tir e bet wee n t he
t rea d and bead.
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