WM, 4440IN Tyres: Information: Installation

WARNING: This page is about a different variant/trim than selected.

WARNING: High tire seating pressure

Risk of squashing or bruising
1. Use a tire filling cage.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Tire filling cage (shown as an example)

After mounting the tubeless tires, inflate them without valve insert to a maximum of 4.0 bar gauge pressure to ensure they are seated properly on the rim. At the latest when the pressure reaches 4.0 bar, the tire beads must pop out of the deep bed and over the hump of the wheel shoulder in order to avoid fractures of the bead core. If necessary, interrupt the process and coat all necessary surfaces with lubricant (tire mounting paste) again. Then repeat the process. Screw in the valve insert and set the specified tire pressure.

If new tires are to be mounted or the tires of one axle are to be replaced, tires of the same make and with the same specification code must always be used on each of the two axles. If tires are replaced on one axle only, the different tread depth in relation to the other axle can cause a noticeable change in the handling the driver has become accustomed to. This is especially true if new tires are mounted on the rear axle. This effect decreases with increasing tire mileage.

The overview of summer and winter tires is included in Technical Information (TI), Group 4. When replacing summer tires, pay close attention to the tire specification number for the same make of tire. The specification characters (for example N0) distinguish the summer tires specially authorised by Porsche from other models of the same tire type and size.

Information

If a tire is damaged and it cannot be determined with absolute certainty that there is no ply damage - with all of its consequences - or if the tire was thermally or mechanically overloaded due to a loss of pressure or other prior damage, we recommend replacement of the tire in question for safety reasons.
When replacing a tire on an axle, make sure that the tread depth of the new tire does not differ from that of the other tire by more than 30 %.
Repairs to the tires are not permitted nor is the use of inner tubes in tubeless tires.
When replacing summer tires, pay close attention to the tire specification number.