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Note
- Remove snow chains before driving on roads
not covered with snow to avoid damaging
tires and wearing the snow chains down un-
necessarily.
- Snow chains, which come into direct contact
with the wheel rim, can scratch or damage
it. Therefore, make sure that the snow
chains are suitably covered . Check the posi-
tion of the snow chains after driving a few
yards and correct if necessary. Follow the in-
structions from the snow chain manufactur-
er when doing so.
(j)
Tips
Where snow chains are mandatory on certain
roads, this normally also applies to vehicles
with all-wheel drive.
Wheel bolts
Wheel bolts must always be tightened to the
correct torque .
The design of wheel bolts is matched to the fac-
tory installed rims. If different rims are fitted,
the correct wheel bolts with the right length and
correctly shaped bolt heads must be used . This
ensures that wheels are fitted securely 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 217.
A
WARNING
Improperly tightened or maintained wheel
bolts can become loose causing loss of con-
trol, a collision and serious personal injury.
-
- Always keep the wheel bolts and the threads
in the wheel hubs clean so the wheel bolts
can turn easily and be properly 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.
Tires
and wheels
- Never use different wheels bolts on your ve-
hicle.
- Always maintain the correct tightening tor-
que for the wheel bolts to reduce the risk of
a wheel loss. If the tightening torque of the
wheel bolts is too low, they can loosen and
come out when the vehicle is moving. If the
tightening torque is too high, the wheel
bolts and threads can be damaged and the
wheel can become loose.
CD
Note
The specified torque for the wheel bolts is 90
ft lb (120 Nm) with a tolerance of± 7 .4 ft lb
(± 10 Nm). Torque wheel bolts diagonally. Af-
ter changing a wheel, the torque must be
checked as soon as possible with a torque
wrench - preferably by an authorized Audi
dealer or qualified workshop.
Low aspect ratio tires
Your Audi is factory-equipped
with low aspect ra-
tio tires. These tires have been thoroughly tested
and been selected specifically for your model for
their superb performance, road feel and handling
under a variety of driving conditions . Ask your au-
thorized Audi dealer for more details.
The low aspect ratio of these tires is indicated by
a numeral of 55 or less in the tire's size designa-
tion. The numeral represents the ratio of the
tire's sidewall height in relation to its tread width
expressed in percentage. Conventional tires have
a height/width
ratio of 60 or more.
The performance of low-aspect-ratio tires is par-
ticularly sensitive to improper inflation pres-
sure. 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 pressures should
be checked at least once a month and always
before a long trip
c>
page 179, Checking tire
pressure.
195
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