Tyre mounting for critical wheels/tyre pairs: Fitting

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Free the wheel from the abraded rubber particles and check for damage.
A new rubber valve must always be fitted. For wheels with steel valves (Turbo wheels), the valves can be reused if they are not damaged. The valves should, however, be replaced after every second tyre change or after 3 years at the latest.
NOTE:
- Do not use commercially available steel valves. The Porsche valves are shorter. See dimension X in Fig 1 . The Porsche version measures 43 mm.
Fig 1: Exploded View Of Porsche Valve Stem
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Coat the wheel and tyre with tyre mounting paste - TIP TOP Universal, order No. 593 0601 or Contifix.
Place the tyre in the correct position on the wheel. Push in mounting arm and position top of the rim flange.
Guide the tyre bead through the assembly head. Fit the tyre bead in the deep bed by turning the wheel to the right.

Fig 2: Guiding Tyre Bead Through Assembly Head
Courtesy of PORSCHE OF NORTH AMERICA, INC.
At the start of the mounting process of the second tyre bead, the mounting arm should be positioned opposite to the valve. This prevents damage to the valve.
Press the second tyre bead onto the wheel as flat as possible and guide through the assembly head.
Insert first holding-down device and position the second holding-down device offset by 90°-120" Fit tyre bead in deep bed by turning to the right.

Fig 3: Inserting First Holding-Down Device And Positioning Second Holding-Down Device
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Fill tyre with compressed air. At approx. 4.0 bar, the beads should pop over the hump. Coat the tyre beads with mounting paste again if necessary so that they can pop over easily and gently.