2017-2018 Cayenne – Manual

2017-2018 Cayenne – Manual

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C - Tire ply composition and material
The number of layers in the tread and sidewalls and their material composition.

D - Maximum permissible inflation pressure
The maximum permissible cold inflation pressure to which a tire can be inflated.

  • Do not exceed the permissible inflation pressure.

E - Maximum load rating
The maximum load in kilograms and pounds can be carried by the tire. If you replace tires always use a tire that has the same maximum load rating as the factory installed tire.

F - Radial
The identification indicates if the tire has radial structure.

G - Term of tubeless or tube tire
Identification for tubeless tires.

Speed code letter
The speed code letter indicates the maximum permitted speed for the tire. This rating is indicated on the tire sidewall.

T up to 118 mph (190 km/h)
Hup to 131 mph (210 km/h)
Vup to 150 mph (240 km/h)
Wup to 167 mph (270 km/h)
Yup to 186 mph (300 km/h)
(Y)up to 186 mph (300 km/h) as for Y tires. Speeds of more than 185 mph (300 km/h) are also possible at a maximum tire load capacity of 85% (confirmation from tire manufacturer required for speeds of more than 185 mph (300 km/h)).

Reading off inscription on wheel

The information is inscribed on the back of the spokes near the tire valve.

Fig. 261: Inscription on wheel

ARim width in inches
BRim-flange contour code letter
CSymbol for drop-center rim
DRim diameter in inches
EDouble hump
FRim offset in mm

Identifying tire damage

Hidden tire damage and damage to rim flange
Tire damage can lead to tires bursting, especially at high speeds.

  • Check tires, including the sidewalls, regularly for foreign bodies, nicks, cuts, cracks and bulges.
  • Cross kerb edges slowly and at right angles if possible. Avoid heavy or sharp-angled impacts against steep and sharp kerbs or against sharp-edged objects (e.g. stones).
  • If in doubt, have the wheel – particularly the inner side – checked by an expert.
    Visit an authorized Porsche dealer, as they have trained technicians and the necessary parts and tools.
  • Tires must never be repaired under any circumstances. Sealing a tire with tire sealant is only an emergency solution so that you can drive to the nearest Porsche dealer.

For safety reasons, tires must be replaced in the event of the following types of damage:

  1. Tire damage where the possibility of a ply fracture cannot be ruled out.
  2. If the tire was thermally or mechanically overloaded as a result of pressure loss or other prior damage.
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