2 7 4 T ire s and w heel s
- Never mount used tires on your vehicle if
you are not sure of their "previous histo-
ry." Old used tires may have been dam-
aged even though the damage cannot be
seen that can lead to sudden t ire failure
and loss of vehicle control.
- If you notice unusual vibration or if the
vehicle pulls to one side when driving, al-
ways stop as soon as it is safe to do so
and check the wheels and tires for dam-
age.
(D Note
Please note that summer and winter tires
are designed for the cond itions that are
Glossary of tire and loading terminology
Accessory weight
means t he comb ined we ight (in excess of
those sta ndard items which may be rep laced)
of au t oma t ic tra nsmission, power steer ing,
power brakes, power windows, power seats,
radio, and heater, to the extent that t hese
items are availab le as factory -installed equip-
ment (whether installed or not) .
Aspect ratio
means t he ratio of the he ight t o the width of
the tire in percent . Numbers of 55 or lower in-
dicate a low sidewall for improved steering re-
sponse and better overall handling on dry
pavement .
Bead
means t he part of the ti re that is made of
steel wires, wrapped or reinforced by ply cords
and that is shaped to fit the rim.
Bead separation
means a breakdown of the bond between
components in the bead.
Cord
means the strands forming the plies in the
tire .
typ ica l in those seasons . Audi recommends
using winter tires during the winter
months . Low temperatures signif icant ly
decrease the e lasticity of summer tires,
which affects tract ion and brak ing ability.
If summer tires are used in very cold tem-
peratures, cracks ca n form on the tread
bars, res ulting in permanent tire damage
that can cause loud driving no ise and un-
balan ced t ires. Audi is not responsible for
th is type of damage .
Cold tire inflation pressure
means the t ire pressu re recommended by t he
vehicle manufacturer fo r a tire of a des igna t ed
size that has not bee n driven for more t han a
coup le of miles (kilometers) at low speeds in
t he three hour period before the tire press ure
is measured or adjusted.
Curb weight
mea ns the we ight of a motor vehicle with
standard equipment including the max imum
capacity of fuel, oil, and coolant, air condi -
tioning and additional weight of optiona l
equipment.
Extra load tire
me a ns a t ire design to operate at higher loads
and at higher inflation pressures t han the cor-
responding standard tire . Extra load tires may
be identified as "XL", "xl", "EXTRA LOAD", or
"RF" on the sidewall.
Gross Axle Weight Rating ("GAWR")
means t he load-ca rrying ca pac ity of a single
axle system , measured at the tire-ground in-
terfaces.
Gross Vehicle Weight Rating ( "GVWR ")
mea ns the maximum total loaded we ight of
t he vehicle. .,.
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