Instructions For Collapsible Wheel/Spare Wheel - Turbo With PCCB: Tires: Fitting

Maximum permissible radial runout and lateral runout of the light alloy wheels = 0.7 mm. Maximum permissible radial runout and lateral runout of the wheel with tire = 1.25 mm. Values less than 1.0 mm - better around 0.5 mm - are desirable.

After mounting the tubeless tires, inflate them without valve insert to approximately 4.0 bar gauge pressure in order to ensure that they are seated properly on the wheel. 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 prescribed 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 than on the other axle can cause a noticeable change in the familiar handling. This is especially the case if new tires are mounted on the rear axle. This effect decreases with increasing tire mileage.

NOTE:

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 on ZR tires are impermissible, as is the use of inner tubes in tubeless tires!
When replacing summer tires, pay close attention to the tire specification number!

The overview of summer and winter tires is included in TIRE PRESSURE OF COLD TIRES (APPROX. 20° C) . The specification code N1, N2, N3 or N0 distinguishes summer tires expressly approved by Porsche from other versions of the same tire type and size.