Table of Contents
Advertisement
2 6 6
T i re s and w h ee l s
Wheel bolts
Wheel bolts must always be tightened to the
correct torque .
The design of wheel bolts is matched to the
factory installed rims. If different rims are fit-
ted, the correct wheel bolts with the right
length and correctly shaped bolt heads must
be used. This ensures that wheels are fitted
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 mode l
~page 294.
_&
WARNING
Improperly tig htened o r maintained whee l
bolts can become loose causing loss of
contro l, a collision and serious persona l 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 t ightened.
- Never grease or oil the wheel bo lts and
the threads in the wheel hubs. They can
become loose while driving if greased or
oiled, even if tightened to the specif ied
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 loosen 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 spec ified torq ue fo r the wheel bo lts is
90 ft lb (120 Nm) w ith a toleran ce of± 7,4
ft lb(± 10 Nm). Torque wheel bo lts diago-
nally . After changing a whee l, the torque
must be checked as soon as possible with a
torque wrench - preferably by an author-
ized Audi dealer or qualified workshop.
Low aspect ratio tires
Your Audi is factory-equ ipped w ith low aspect
ratio tires . These tires have been tho roughly
tested and been se lected specifically fo r your
model for their superb perfo rmance, road fee l
and hand ling under a variety of d riving cond i-
tions . Ask your au t hor ized Audi dealer for
more de t ails .
The low aspect ratio of these t ires is ind icated
by a numera l of
55 or less
in the tire's s ize
designation. The nume ra l represen t s the rat io
of the tire's sidewall height in relation to its
tread width expressed in percentage . Conven-
tiona l tires have a he ight/width ratio of 60 or
more.
The performance of low-aspect-ratio tires is
particularly sensiti ve to improper infl ation
press ure. It is therefore important that low
aspect ratio tires are inflated to the specified
pressure and that the inflation pressure is
regularl y checked and mainta ined. Tire pres-
sures should be checked at least once a
month and always before a long trip
~
page 249, Checking tire pressure.
What you can do to avoid tire and rim
damage
Low aspect ratio tires can be damaged more
easily by impact wit h potholes, curbs, gull ies
or ridges on the road, pa rticularly if the tire is
underinfla t ed .
In order to minimize the occurrence of impact
damage to the tires of you r vehicle, we recom-
mend that you observe the follow ing precau -
tions:
- Always ma inta in recommended inflation
pressures. Check your tire pressure eve ry
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
..,.
Advertisement
Table of Contents
