Porsche 928S 1983, Руководство пользователя

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ted that the difference in tread depth on one
axle must not be more than 30%.
Visual inspection.
8 Tyre replacement
The tyres approved for your car are listed in
the vehicle log book. Only buy new tyres of the
same make and type which comply with these
specifications. Always replace the tyres on
one axle at a time because
a) the rear axle is more critical from a stabi-
lity point of view and
b) in wet conditions it is the front wheels
which hit deep water first, while the rear
wheels run mostly in the track of the
front ones.
Make sure that new valves are fitted whene-
ver the tyres are changed. During their initial
break in period new tyres do not have their
full grip. It is therefore necessary to run them
at only moderate speeds during the first
100-200 km (60-120 miles). Never use dif-
ferent types of tyre. Have tyres fitted by a
specialist.
For this reason you should only drive over
curbs slowly and preferably at right angles.
Take car when parking at or on curbs.
Tire designations
Due to new speed and load ratings for radial
tires, new designations have come into force
for winter tires for your car.
9 Curbs
Hard impact against curbs (traffic islands
too) is dangerous. It can result in hidden tyre
damage which only becomes noticeable la-
ter on (risk of high speed failure); tyres have
a memory!
10 Tyre storage
Always store tyres in a cool, dry and dark pla-
ce. Tyres not on rims should be stood up.
Avoid any contact with fuel, oil or grease.
During the transitional period tires may bear a
dual designation, e. g., 185/70 SR 15 M + S Q.
If so, the valid designation is the new one.
The old designation continues to be used for
VR tires, e.g., 225/50 VR 16 (VR = code letter
for radial tires for speeds above 210 km/h).
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