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300
Tires and wheels
secure ly and that the brake system functions
correctly .
In certain circumstances, you may not use
wheel bolts from a different vehicle - even if it
is the same model ¢ page 328.
A
WARNING
Improperly tightened or maintained whee l
bolts can become loose causing loss of
control, a collision and serious personal in-
jury.
- Always keep the wheel bolts and the
threads in the wheel hubs clean so the
wheel bolts can turn easily and be prop-
erly tightened.
- Never grease or oil the wheel bolts and
the threads in the wheel hubs. They can
become loose while driving if greased or
oiled, even if tightened to the specified
torque.
- Only use wheel bolts that belong to the
rim being installed.
- Never use different wheels bolts on your
vehicle .
-Always maintain the correct tighten ing
torque for the wheel bolts to reduce the
risk of a wheel loss. If the tightening tor-
que of the wheel bolts is too low, they
can loos en and come out when the veh i-
cle is moving . If the tightening torque is
too high, the whee l bolts and threads
can be damaged and the wheel can be-
come loose.
{[)
Note
The specified torq ue for the wheel bolts is
120 ft lb (160 Nm) with a tolerance of
± 7,4 ft lb(± 10 Nm). Torque whee l bolts
diagonally. After changing a whee l, the
torque must be checked as soon as possi-
ble with a torque wrench - preferably by an
author ized Audi dealer or qualified work-
shop.
Low aspect ratio tires
Your Audi is factory-equipped
with low aspect
ratio tires. These tires have been thoroughly
tested and been se lected specifically for your
model for their superb performance, road feel
and handling under a variety of driving condi-
t ions . Ask your authorized Audi dealer for
more details.
The low aspect ratio of these tires is indicated
by a numera l of
55 or less
in the tire's size
designation. The numera l represents the ratio
of the tire's sidewall height in relation to its
tread width expressed in percentage. Conven-
t iona l tires have a he ight/w idth ratio of 60 or
more .
The performance of low-aspect-ratio tires is
particularly sensitive to improper inflation
pressure. It is therefore important that low
aspect ratio tires are inflated to the specified
pressure and that the inflation pressure is
regularly checked and maintained. Tire pres-
sures should be checked at least once a
month and always before a long trip
¢
page 282, Checking tire pressure .
What you can do to avoid tire and rim
damage
Low aspect ratio tires can be damaged more
easily by impact with potholes, curbs, gullies
or ridges on the road, particularly if the tire is
underinflated .
In order to minimize the occurrence of impact
damage to the tires of your vehicle, we recom-
mend that you observe the following precau-
tions:
- Always maintain recommended inflation
pressures. Check your tire pressure every
2,000 miles (3,000 km) and add air if neces-
sary .
- Drive carefully on roads with potholes, deep
gullies or ridges. The impact from dr iving
through or over such obstacles can damage
your tires. Impact with a curb may also
cause damage to your tires .
- After any impact, immed iately inspect your
tires or have them inspected by the nearest
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