Audi R8 2007 Manuel du propriétaire Page 170

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Wheels and tyres168
Tread wear indicators
The tread wear indicators show the condition of the tyre
treads.
The original tyres on your vehicle have 1.6 mm high “tread wear
indicators” fig. 122 running across the tread. Depending on the
make, there will be 6 to 8 of them spaced at equal distances around
the tyre. Markings on the tyre sidewall (for instance the letters “TWI”
or a triangle) indicate the positions of the tread wear indicators.
The minimum tread depth required by law in Germany is 1.6 mm
(measured in the tread grooves next to the tread wear indicators).
Different figures may apply in other countries.
WARNING
To avoid putting safety at risk, the tyres must be replaced at the
latest when the tread is worn down to the tread wear indicators.
Especially in difficult driving conditions such as wet or icy
roads, it is important that the tyres have sufficient tread depth.
The tread depth should same on the tyres of both the front and the
rear axles.
The decrease in driving safety due to insufficient tread depth is
particularly evident in vehicle handling, when there is a risk of
aquaplaning in deep puddles of water and when driving through
corners. Braking is also adversely affected.
The speed has to be adapted accordingly, otherwise there is a
risk of losing control over the vehicle.
Replacing wheels and tyres
It is important to use the correct wheels and tyres when
replacement is necessary.
All four wheels must be fitted with tyres of the same type
and preferably the same tread pattern.
If possible, tyres should be replaced at least in pairs and
not individually (i.e. both front tyres or both rear tyres
together).
Never use tyres whose actual size exceeds the dimen-
sions of the factory-approved makes of tyre.
If you wish to fit the vehicle with non-standard rims or
tyres, it is advisable to consult an Audi R8 dealer before
purchasing them.
The tyres and wheel rims are an essential part of the vehicle's
design. The tyres and rims approved by Audi are specially matched
to the characteristics of the vehicle and make a major contribution
to good roadholding and safe handling .
The sizes of the rims and tyres approved for your vehicle are listed
in the vehicle's documents (e.g. EC Certificate of Conformity or COC
document
2)
). The vehicle documents vary depending on the
country of residence.
Fig. 122 Tyre tread:
Tread wear indicators
2)
COC = Certificate of conformity
WARNING (continued)
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