Wheels/Tires - Summer Wheel/Tire Applications
Cayenne2/02 4440
Binder - 4, Running Gear
Summer Tires and Wheels
Date: 2-28-03
Vehicle Type:
Cayenne S/Cayenne Turbo
Model Year:
As of 2003 (3)
Concerns:
Summer Tires and Wheels - status October 2002
Information:
In addition to the usual summer and winter tires, 18-inch all-season tires and 18-inch all-terrain tires have been developed. It is possible to use the same tire size and tread all round, i.e. the same tire size is used on both axles.
Tire Speed Ranges:
T = max. 120 mph (190 km/h)
H = max. 130 mph (210 km/h)
V = max. 150 mph (240 km/h)
Y = max. 185 mph (300 km/h)
Summer Tires
Besides the high demands on summer tires in terms of lateral and longitudinal dynamic performance, another important criteria is the high-speed strength of the tires, which is matched to the permissible axle loads and the top speed of the Cayenne of more than 165 mph (265 km/h).
All-Season Tires
Targeted optimization of the tire compositions and treads has produced a good compromise between the driving characteristics at summer temperatures and driving safety on snow and ice. The all-season tires approved for the Cayenne feature an M&S identification and are perfectly suitable for winter driving.
All-Terrain Tires
The approved all-terrain tires are designed for all road conditions. In addition to its driving safety on dry and wet roads, the all-terrain tire also features an M&S identification and is thus also suitable for winter driving. In off-road driving situations, the all-terrain tires demonstrate a high level of traction and propulsive power on diverse surfaces such as dry terrain, gravel, rock, mud, wet grass and sand. Especially on unpaved (off road) surfaces, this superior traction is achieved though a good tread self-cleaning effect, which can be influenced by the tread design and an appropriate choice of rubber composition.
Tire Pressure Monitoring System
On vehicles with tire pressure monitoring system, the setting of the on-board computer must match the tire type mounted on the vehicle. The Owner's Manual describes how to set the on-board computer. When replacing a defective tire, bear in mind that the tread-depth difference between the two wheels of an axle must not exceed 30 %.
Makes/Types:
Approved Tire Makes and Types
Tire Pressure:
The specified tire pressures apply only to the tire types and makes approved by Porsche (including all of the winter, all-terrain, all-season and summer tire types) and are specified for cold tires approx. 68° F. (20° C.). These are minimum tire pressures and must always be observed, since in addition to the unfavorable driving performance, serious tire damage could be caused.
On vehicles equipped with a tire pressure monitoring system, use the rocker switch to select the type of load on the on-board computer "Main menu > Tire pressure > Settings > Load".
Sizes:
Wheels:
Wheel Mounting:
Removing/Mounting:
Screw the assembly aids (threaded pins for wheel mounting, Part Number 999 571 074 30), instead of 2 wheel bolts, into the wheel hub before mounting or removing a wheel. During removal, first remove the 3 remaining wheel bolts and remove the wheel carefully, without touching the brake discs.
The wheels are secured with standard wheel bolts M 14 x 1.5 x 51, Part Number, 955 361 203 00. Tightening torque: 160 Nm (118 ftlb.).
Important Note:
Never grease the wheel bolts. Only "original Cayenne wheel bolts" should be used! Screw in wheel bolts by hand and then tighten evenly in diagonally opposite sequence. Start at the top when tightening.
General:
The procedure for changing the wheels or tires on vehicles (with or without tire pressure monitoring system) is described in Group 4 of the Cayenne Technical Manual.
Literature:
Cayenne Technical Manual, Group 4:
> Repairs: 44 - Wheels and tires.
Owner's Manual
> Observe the chapters Multi-purpose display", "Wheels" and "Car care".
Disclaimer