Further To 1: Fitting The Tyre On The Rim

Remove rubber residues and dried-on tyre paste from the rim, especially from the rim bead and the hump.

Examine rim for damage; remove old balancing weights.

Use the prescribed tyre mounting paste (only TIP TOP Universal, order no. 593 0601, 3.5 kg bucket, or Contifix) so that the tyre does not turn on the rim the first time the car is driven, thereby counteracting all your careful work. If the tyre turns by as little as 20 mm with respect to the rim, this can worsen an optimum balancing result.

Fit tyre on the rim. When doing so, it is a good idea - and even necessary in some cases - to fit the tyre in a favorable position with respect to the wheel (matching). Compare Controlled and Uncontrolled matching below.

WARNING: High tyre seating pressure

Risk of squashing or bruising
→ Use a tyre filling cage.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Tyre filling cage

Fill tyre.

IMPORTANT: By the time the pressure reaches 3.3 bar (max. 4.0 bar in the tyre filling cage), at the latest, the tyre beads (coming out of the rim well base) must jump over the hump of the rim bead in order to prevent fractures or damage to the bead core. Interrupt the process if necessary and generously lubricate all necessary surfaces with the prescribed sliding compound (tyre mounting paste). Then repeat the process.

IMPORTANT: Damage to the bead core resulting from incorrect tyre assembly/disassembly will cause an increase in fluctuations in power (radial/lateral fluctuation in power). This is apparent when you roll the tyre on the driving surface.

Uncontrolled matching: Turn the tyre on the wheel by 90° or 180° if necessary in order to achieve an acceptable value with regard to rolling smoothness (true running, imbalance and distribution of balance weights).

Controlled matching: With a balancing machine with matching program. In most cases, this produces an even better result with regard to the rolling smoothness (true running, imbalance and distribution of the balance weights) than can be achieved with uncontrolled matching.

Check the fit of the tyre on the rim using the bead centering line.

Set the prescribed tyre pressure.