Volkswagen Polo Service & Repair Manual: Run-Flat Tire, Overview of a PAX Tire
| PAX tires involve specially developed system that exhibits
the following differences in comparison to conventional tires: |
| Pax Tires with Supporting Ring |
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-II- PAX tires without air |
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The tire is anchored to a special rim that prevents it from
sliding off when pressure is lost. The rubber supporting ring
ensures stability in emergency operation. |
| The inner and outer bead diameter are different sizes. This
makes it possible to place the tire in a supporting ring. |
| The tire is anchored to the rim differently. |
| In this way, the tire height could be reduced considerably.
That was possible because the area near the bead could be
considerably smaller due to the special connection between the
tire and rim. |
| The tire bead is formed so that it can engage in the rim
seat. Therefore, it remains firmly in the seat when pressure is
lost. |
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| Standard Tire, Beat Area Construction |
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| PAX Tire, Bead Area Construction |
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| The secure seating of the tire in the rim is ensured in all
driving situations due to the type of construction. |
| A wedge-shaped component of the tire is pressed between the
bead bundle and rim when loaded. This happens independently of
the pressure in the tire. |
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| In contract to conventional tires, tires with emergency
running characteristics (PAX) exhibit differences in regard to
dimensions and designations. |
| Therefore, PAX tires can only be mounted on special rims (PAX). |
| 1 - |
Width in mm: the tire width from flank to flank on standard
rim (corresponds to width specification on standard tire). |
| 2 - |
Outer circumference in mm: maximum diameter of a new tire- |
| 3 - |
Designated diameter in millimeters on standard rim seat |
| 4 - |
Smaller bead diameter in millimeters: rim seat on outer side |
| 5 - |
Larger bead diameter in millimeters: rim seat on inner side |
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The vehicle can be equipped with run-flat tires as an
option.
The Seal Inside technology is a system that allows the
vehicle to continue ...
Other materials:
Current Draw Test
WARNING
Batteries that have a light yellow visual indicator
do not have to be tested or charged. Jump starting must
not be used!
There is a risk of explosion during testing,
...
Tires, Mounting, Run-Flat Tires and Ultra High Performance Tires
Only trained personnel can perform the assembly work on
run-flat tires and ultra high performance tires.
If equipped check the tire pressure monitoring sensor with
the vehicle diagnostic tester and if necessary replace.
...
Refrigerant Circuit with Expansion Valve
A-Low pressure side of refrigerant circuit.
B-High pressure side of refrigerant circuit.
Component
Aggregate State of Refrigerant
Pressure bar (psi) Positive Pressure
Temperature
...
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Run-Flat Tire, Seal Inside-Technology