In 1974 Pirelli developed their new ultra low profile P7 tyres Porsche soon took advantage by fitting 205/50 R 15 P7 to the front of the Porsche 930 and these 225/50 ZR 15 to the rear. When Lamborghini moved the Countach on to the 5000 QV model they increased the front tyre size to fit 225/50 – 15 on the front and on the rear 345/35 VR 15 Pirelli P7
Pirelli Collezione Classic TIres. in the early 50s, the world of sports cars was rocked by the introduction of the PIRELLI CINTURATO Tyres. The classic CINTURATO tyre moved boundaries forward as to what could be expected of a tyre as, until then, radial tyres had been invented during the war and patented in 1946 as a way of enhancing the longevity of a tyre. Because the tread of the tyre had separate bracing to the carcass, this allowed the sidewalls to flex, without that flex continuing on to the tread. In that the tread now remained more stably in contact with the road it did not scrub the tread away. The extra added benefit was that in that the tread did not move it also had a better hold on the road and gave considerably enhanced grip.