Audi R8 2017 Owner's Manual page 252

Wheels
"' Only use winter tires that are approved for your
vehicle.
"' Please note that the maximum permitted
speed may be lower with winter tires c>
,&..
An
authorized Audi dealer or authorized Audi Serv-
ice Facility can inform you about the maximum
permitted speed for your tires.
"'Check the tire pressure after installing wheels
c>page 245.
The effectiveness of winter tires is reduced great -
ly when the tread is worn down to a depth of
0.157 in (4 mm). The character istics of winter
tires also decrease great ly as the tire ages, re-
gardless of the remaining tread.
A
WARNING
- Never drive faster than the maximum per-
mitted speed for your tires. This could cause
the tires to heat up too much. This increases
the risk of an accident because it can cause
the tire to burst.
- Always adapt your driving to the road and
traffic conditions. Drive carefully and reduce
your speed on icy or slippery roads. Even
winter tires can lose traction on black ice.
@
For the sake of the environment
Reinstall summer tires at the appropriate
time, because they provide better handling
when roads are free of snow and ice. Summer
tires cause less road noise, tire wear and fuel
consumption.
(D
Tips
You can also use all season tires instead of
winter tires . Please note that in some coun-
tries where w inter tires are required, only
w inter t ires with the
&
symbol may be per-
mitted.
Snow chains
Snow chains not only improve the driving in win-
ter road conditions, but also the braking .
"' Only insta ll snow chains on the rear wheels.
250
"' Check and correct the seating of the snow
chains after driving a few feet, if necessary. Fol-
low the instructions from the manufacturer.
"' Note the maximum speed of 30 mph (SO km/
h). Note the local regulations.
Use of snow chains is only permitted with certain
rim/tire combinations due to technical reasons.
Check with an authorized Audi dealer or author-
ized Audi Service Facility to see if you may use
snow chains .
You must remove the snow chains on roads with-
out snow . Otherwise, you could impair driving
ability and damage the t ires.
A
WARNING
Using incorrect snow chains or install ing snow
chains incor rectly can result in loss of veh icle
control, which increases the risk of an acci-
dent.
(D
Note
- Snow chains can damage the rims/wheel
covers* if the chains come into direct con-
tact with them. Remove the wheel covers*
first. Use coated snow chains.
- Using snow chains that add more than 0.53
in (13,5 mm) of height can severely damage
the whee l housings and other vehicle com-
ponents.
(D
Tips
When using snow chains, it may be useful to
switch on sport mode c> page 82.
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 mode l for
their superb performance, road fee l and handling
under a variety of driving condit ions. 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 ..,