[Xaver]

Meines Wissens schreibt das Reglement nur die maximale Reifenbreite und den maximalen Reifendurchmesser vor.

Haste den Passus parat aus dem hervorgeht daß die F1 Ballonreifen fahren muß ?

12.4 Wheel dimensions :

[FONT=PKNFH O+ T T 3353o 00,T T 335 3o][FONT=PKNFH O+ T T 3353o 00,T T 335 3o]12.4.1
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[FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]Complete wheel width must lie between 305mm and 355mm when fitted to the front of the car and between 365mm and 380mm when fitted to the rear. [/FONT][/FONT][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]

[/FONT][FONT=PKNFH O+ T T 3353o 00,T T 335 3o][FONT=PKNFH O+ T T 3353o 00,T T 335 3o]12.4.2

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[FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]Complete wheel diameter must not exceed 660mm when fitted with dry-weather tyres or 670mm when fitted with wet weather tyres. [/FONT][/FONT][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]

[/FONT][FONT=PKNFH O+ T T 3353o 00,T T 335 3o][FONT=PKNFH O+ T T 3353o 00,T T 335 3o]12.4.3

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[FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]Complete wheel width and diameter will be measured horizontally at axle height, with the wheel held in a vertical position and when fitted with new tyres inflated to 1.4 bar. [/FONT][/FONT][FONT=PKNFA A+ T T 3351o 00,T T 335 1o][/FONT][FONT=PKNFH O+ T T 3353o 00,T T 335 3o][FONT=PKNFH O+ T T 3353o 00,T T 335 3o]12.4.4 [/FONT][/FONT][FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]Wheel bead diameter must lie between 328mm and 332mm. [/FONT][/FONT]

12.6 Specification of tyres :

[FONT=PKNFH O+ T T 3353o 00,T T 335 3o][FONT=PKNFH O+ T T 3353o 00,T T 335 3o]

12.6.1 [/FONT][/FONT][FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]An intermediate tyre is one which has been designed for use on a wet or damp track.
All intermediate tyres must, when new, have a contact area which does not exceed 280cm² when fitted to the front of the car and 440cm² when fitted to the rear. Contact areas will be measured over any square section of the tyre which is normal to and symmetrical about the tyre centre line and which measures 200mm x 200mm when fitted to the front of the car and 250mm x 250mm when fitted to the rear. For the purposes of establishing conformity, void areas which are less than 2.5mm in depth will be deemed to be contact areas.

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12.6.2 [/FONT][/FONT][FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]A wet-weather tyre is one which has been designed for use on a wet track.
All wet-weather tyres must, when new, have a contact area which does not exceed 240cm² when fitted to the front of the car and 375cm² when fitted to the rear. Contact areas will be measured over any square section of the tyre which is normal to and symmetrical about the tyre centre line and which measures 200mm x 200mm when fitted to the front of the car and 250mm x 250mm when fitted to the rear. For the purposes of establishing conformity, void areas which are less than 5.0mm in depth will be deemed to be contact areas.

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12.6.3 [/FONT][/FONT][FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]Tyre specifications will be determined by the FIA no later than 1 September of the previous season. Once determined in this way, the specification of the tyres will not be changed during the Championship season without the agreement of all competing teams.

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12.7 Tyre Gases :

[FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]Tyres may only be inflated with air [/FONT][/FONT][FONT=PKNEP M+ T T 334 Eo 00,T T 33 4 Eo][FONT=PKNEP M+ T T 334 Eo 00,T T 33 4 Eo]U[/FONT][/FONT][FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]or[/FONT][/FONT][FONT=PKNEP M+ T T 334 Eo 00,T T 33 4 Eo][FONT=PKNEP M+ T T 334 Eo 00,T T 33 4 Eo]U [/FONT][/FONT][FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]nitrogen.
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[FONT=PKNFA A+ T T 3351o 00,T T 335 1o][FONT=PKNFA A+ T T 3351o 00,T T 335 1o]Ergibt sich daraus nicht die komplette Dimensionierung; auch unter Berücksichtigung des Drucks?[/FONT][/FONT]

[Der Jens]

Complete wheel diameter must not exceed 660mm when fitted with dry-weather tyres or 670mm when fitted with wet weather tyres.

Heißt also: der maximale Außendurchmesser ist vorgeschrieben. Einen Mindestdurchmesser gibt es nicht.
Gemäß Reglement späche also nichts dagegen, den Außendurchmesser zu reduzieren wenn sich durch die dadurch reduzierte Flankenhöhe eine Verbesserung ergeben würde.

Edit: Jedenfalls betragen die F1 Reifengrößen umgerechnet auf die Nomenklatur für Straßenreifen etwa 375/45/13 hinten und 345/50/13 vorne. Das sind doch mal coole Größen, oder ?