2013-2014 Cayenne – Manual

2013-2014 Cayenne – Manual

Page: 293

Tire life
Tire life depends on various factors, i.e., road surfaces, traffic and weather conditions, driving habits, type of tires and tire care.

  • Inspect your tires for wear and damage before driving off. If you notice uneven or substantial wear, wheels might need alignment or tires should be balanced or replaced.

Tire wear
The original equipment tires on your Porsche have built-in tire wear indicators. They are molded into the bottom of the tread grooves and will appear as approximately 1/2 in. (12 mm) bands when the tire tread depth is down to 1/16 of an in (1.6 mm).

When the indicators appear in two or more adjacent grooves, it is time to replace the tires. We recommend, however, that you do not let the tires wear down to this extent.

Worn tires cannot grip the road surface properly and are even less effective on wet roads.

In the United States, state laws may govern the minimum tread depth permissible. Follow all such laws.

Excessively-worn Tires
Driving on worn tires can result in loss of control of the vehicle and could cause serious personal injuries or death.

  • Do not drive with worn tires or tires showing cuts or bruises as they may lead to sudden deflation and loss of control which could cause severe personal injury.

  • If you notice that tires are wearing unevenly, consult your authorized Porsche dealer.

Uneven wear may not always be due to improper wheel alignment. It can be the result of individual driving habits such as cornering at high speeds. If the tire pressure is not checked and adjusted regularly, abnormal tire wear can also occur.

Tire care

  • Avoid damaging tires and wheel rims.
  • If you must drive over a curb or other obstacle, drive slowly and at an obtuse angle.
  • Check tires for uneven wear and damage before driving off.
  • Remove imbedded material.
  • Replace worn or damaged tires immediately.
  • Keep oil, fuel, brake fluid, etc. away from tires.
  • Replace missing valve stem caps. fKeep tires inflated correctly.
  • Wash tires when washing the vehicle. Also clean inner side of wheels.
  • Do not use abrasive cleaners when washing the wheels.
  • Check wheel rims for corrosion.
  • Remove road salt, if driving in winter.

Tire damage, puncture

  • Please see the chapter "HIGH-PRESSURE CLEANING EQUIPMENT, STEAM CLEANERS" on page 273.

Damaged Tire Check
Driving the vehicle with low tire pressure increases risk of a tire failure and resulting loss of control. Furthermore, low tire pressure increases the rate of wear of the affected tires.

  • Check tires – including sidewalls – regularly for foreign bodies, nicks, cuts, cracks and bulges.
  • After driving off road, examine tires for signs of damage such as cuts, tears, bulges or foreign objects stuck in the tread. Replace a damaged tire if necessary.
  • Cross curb edges slowly and at right angles if possible.
    Avoid driving over steep or sharp curbs.
  • In cases of doubt, have the wheel (particularly the inner side) checked by an authorized Porsche dealer.

In case of tire damage, where it is uncertain whether there is a break in the ply with all its consequences or tire damage caused by thermal or mechanical overloading due to loss of pressure or any other prior damage, we recommend that the tire be replaced for safety reasons.

If one faulty tire is replaced it should be noted that the difference in tread depth on one axle must not exceed 30%. Handling inconsistencies may result.

  • Perform a visual inspection if necessary.
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