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200
Tires and wheels
Maximum loaded vehicle weight
means t he sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity we ight, and
(d) Produ ction opt ions weight
Maximum (permissible) inflation pressure
me ans t he max imum cold inflation pressu re
to which a tire may be inflate d . Also called
"maxim um inflation press ure."
Normal occupant weight
means 150 lbs. (68 kilog rams) times the
nu mbe r of occupants seated in t he vehicle up
to the t ota l sea t ing capaci ty of your vehicle .
Occupant distribution
means dist ribution of occupants in a veh icle .
Outer diameter
means t he overa ll diameter of a n inflated new
tire.
Overall width
means t he linear dis t an ce between t he ext er i-
ors of t he sidewalls of an inflated t ire, includ-
ing e levations due to labeling, decorations, or
protective bands or ribs.
Ply
mea ns a laye r of rub ber-coate d parall e l co rds.
Production options weight
means t he comb ined we ight of t hose installed
regular produc t ion options weigh ing ove r 5
lbs . (2 .3 kg) in excess of t hose standard items
which they repla ce, not previously considered
in cur b weight o r a ccessory weig ht, incl uding
heavy duty brakes, ride leve le rs, roof ra ck,
heavy duty ba t tery, a nd specia l t rim .
Radial ply tire
means a pneumatic t ire in which the ply cords
that ext end t o t he beads are laid at sub st an -
ti a lly 9 0 degrees t o t he ce nt erline of th e
tread .
Recommended inflation pressure
see ~ page 199, Cold tire infla tion pressure.
Reinforced tire
means a t ire designed to operate at higher
loads and at highe r infla t ion press ures tha n
t he correspo nding sta ndar d tire . Reinforced
t ires may be ide nt ified as "XL", "xl", "EXTRA
LO AD", or "RF" on th e sidewall.
Rim
means a metal s up po rt for a tire or a t ire and
tu be assembly upon which t he tire beads are
sea t ed.
Rim diameter
means nom inal d iameter of the bead seat. If
you change your wheel s ize, you w ill have to
purchase new tires to match t he new rim di-
ameter .
Rim size designation
means rim diameter and width.
Rim width
means nom inal di sta nce between rim flanges .
Sidewall
means tha t po rt ion of a t ire betw ee n t he
t read and bead.
Speed rating (letter code)
means the speed at which a tire is designed to
be driven for extended pe riods of time. The
rati ngs range from 93 mph (150 km/h) to
186 mph (298 km/h) ~page 210 . You may
not fi nd this informa t ion o n all tires because
it is not req uired by law.
The speed rating letter code, where applica-
ble, is molde d on the tire sidewall a nd ind i-
cates the ma ximu m pe rm iss ible road spee d s
~
A
in Winter tires on page 213 .
Tire pressure monitoring system
mea ns a system that detects when o ne or
more of a ve hicle 's tires are unde rinf lated an d
illuminat es a low tir e pressure wa rning t ell-
tal e.
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