Volkswagen Golf Service & Repair Manual: Run-flat tyres, structure of a PAX tyre
| Run-flat tyres (PAX) are specially developed tyres that
differ from conventional tyres as follows: |
| PAX tyre with support ring |
| – |
-I- Pax tyre with regular tyre
pressure |
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| – |
The tyre locks in place on a special wheel rim which
prevents the tyre from slipping off in case of pressure loss.
The rubber support ring ensures proper stability when driving
with a flat tyre. |
| The inner and outer bead diameters differ in size. This
makes it possible to add a support ring inside the tyre. |
| The tyre is secured differently to the rim. |
| This allows the tyre height to be greatly reduced. This was
made possible by the reduced bead area due the special
connection between the tyre and rim. |
| The tyre beads are formed such that they engage in the rim
seat. Therefore, the tyre remains firmly secured to the
wheel/rim even when there has been a loss of inflation pressure. |
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| Construction of the bead area for a standard tyre |
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| Construction of bead zone on tyres with run-flat capability
(PAX) |
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| Seating of tyres with run-flat capability (PAX) |
| Due to the construction of the tyre, it remains firmly
attached to the wheel in all driving situations. |
| A wedged-shaped component of the tyre is thereby pressed
between the bead core and rim by the load. This occurs
regardless of the tyre pressure. |
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| Dimensions of tyres with run-flat capability (PAX) |
| As compared to standard tyres, run-flat tyres (PAX) have
different dimensions and designations. |
| Run-flat tyres (PAX) can therefore only be fitted to special
wheels designed for the PAX system. |
| 1 - |
Width in millimetres: tyre width from sidewall to sidewall
on the standard rim (corresponds to the width dimension on
standard tyres) |
| 2 - |
Outer diameter in millimetres: maximum diameter of the new
tyre |
| 3 - |
Nominal diameter in millimetres on standardised rim seat |
| 4 - |
Small bead diameter in millimetres: outer rim seat |
| 5 - |
Larger bead diameter in millimetres: inner rim seat |
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The vehicles are equipped with self-sealing tyres as an
option.
This technology, referred to as seal inside technology, is a
system that ...
Other materials:
Adjusting door
Special tools and workshop equipment
required
Door alignment tool -3320-
Universal joint for 3320 -3320/1-
Bit for 3320 -3320/2-
Bit for 3320 -3320/3-
Torque wrench -V.A.G 1331-
Socket -3410
Setting gauge -3371-
...
Handling wheels and tyres
Fig. 200 Diagram showing how to swap wheels
First read and observe the introductory information
and safety warnings The tyres are the most used and most underestimated parts
of a vehicle. Tyres are very important as the narrow tyre surfaces are the only
contact between the vehicle and the ...
Removing and installing track rod
Special tools and workshop equipment
required
Torque wrench -V.A.G 1331-
Torque wrench -V.A.G 1332-
...
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Run-flat tyres, seal inside technology