Audi R8 2009 Owner's Manual page 215

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Tires and wheels
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&
WARNING (continued)
Carrying more weight than your vehicle was designed to carry
will prevent the vehicle from handling properly and increase the
risk of a loss of vehicle control.
The brakes on a vehicle that has been overloaded may not be
able to stop the vehicle within a safe distance.
Tires on a vehicle that has been overloaded can fail suddenly
causing loss of control and a crash.
&
WARNING
Incorrect tire pressures and/or underinflation can lead to a
serious or fatal accident.
Incorrect tire pressures and/or underinflation cause increased
tire wear and can affect the handling of the vehicle.
Incorrect tire pressures and/or underinflation can also lead to
sudden tire failure, including a blowout and sudden deflation,
causing loss of vehicle control. •
Checking
tire pressure
The correct tire pressure for the tires originally installed
on your vehicle is listed on the tire pressure label located
on driver 's side 8-pillar .
The recommended tire pressures are on the tire pressure labe l and
in the table => page 211, "Cold tire inflation pressure". This means
that the pressure must be checked and adjusted when the tire has
not been driven for more than a couple of miles (kilometers) at low
speeds during the previous three hours. Air in the tires expands
when the tire heats up as a result of internal friction as it flexes in
use. The tire pressure is higher when the tire has warmed up than
when it is "cold."
It is the inflation pressure in a "cold" tire that counts. The refore, you
should never let air out of a warm tire to match "Cold tire inflation
pressure" recommendations=>
page 211. The tires would then be
underinflated
and could fail suddenly.
The tire pressure label on your Audi lists the recommended cold tire
inflation pressures for the new, original equipment tires that were
on your vehicle at the time it was manufactured. For the location of
the label
=>
page 211, fig . 124.
Most tires lose air naturally over time. They can also lose some air if
you drive over a pothole or hit a curb while parking. It is usually not
possible to see whether the radial tires used today are underinflated
just by looking at them.
Therefore, be sure to check tire pressures at least once a month and
always before going on a long trip. Make sure to take the number of
people and the amount of luggage into account when adjusting tire
pressure for a trip - even one that you would not consider to be
" long ." See=> page 215, "Tires and vehicle load limits" for more
important information.
Always use an accurate tire pressure gauge when checking and
adjusting inflation pressures . Check all of the tires. If the pressure in
any tire is too high when the tire is "co ld," let air out of the tire
slowly with the edge of the tire gauge and keep checking the pres -
sure until you reach the pressure that is correct for the load (passen -
gers and luggag e) and kind of driving you plan to do.
If the pressure in any tire is too low, note the difference between the
pressure in the cold tire and the pressure you need and add the air
that you need to reach the correct pressure for the vehicle load
(passengers and luggage) for the tires on your vehicle as listed on
the on your vehicle and in this manual and the kind of driving you
plan to do.
Never exceed the maximum inflation pressure listed on the tire
sidewall for any reason.
Remember that the vehicle manufacturer, not the tire manufacturer,
determines the correct tire pressure for the tires on your vehicle.
.,_
Vehicle care

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