Porsche 968 - Collapsible Spare Wheel Details; Collapsible Tyre Pressure and Speed

Necessary tyre pressure : 2.5 bar (36 psi).
Set the pressure precisely with the pressure tes-
ter. To guard against excessive inflation press-
ure, the collapsible spare wheel is provided with
a blow-off valve. If the pressure is too high, the
process of air removal should be accelerated by
operating the inflation valve.
The spare wheel with the collapsible tyre may
only be used in an emergency, for short distan-
ces.
The maximum speed for this tyre is 80 km/h
(50 mph) and this speed must not be exceeded
because of the changed handling characteristics
of the vehicle, and the wearing properties of the
tyre. The same law applies to depth of tread for
this tyre as for the normal tyres.
The vehicle may only be fitted with one collap-
sible tyre.
The collapsible tyre expands through warming
up as it is used . When deflating the tyre (com-
pletely remove the valve core), it requires sev-
eral hours to cool down and thereby assume its
original form, before it can be replaced in the
well in the luggage compartment.
The collapsible tyre can be neither repaired nor
mounted in a normal workshop. All work on
these tyres must be left to the manufacturer. If
the collapsible tyre develops a fault, please con-
sult your Official Porsche Centre.
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