I would be interested in your opinions.
I think pre 69 Ferrari's fitted Pirelli Cinturato
. Up untill 1964 they fitted either 185VR16 or 185VR15 Pirelli Cinturato ™ CA67
In 1964 Pirelli introduced a bigger tire the 205VR15 Pirelli Cinturato ™ CN72
HS and it is because of this tyre cars like the 250GT 2+2 stopped fitting the 185VR15 Pirelli Cinturato ™
CA67 when it changed to the 330 and started fitting 205VR15 CN72 Cinturato HS
Granted the early 50's cars that had 400mm Ferrari Borrani Wire Wheels
fitted was probably to fit the Michelin X, because before the Cinturato came out in 1952, the Michelin X was the only radial tyre
I am not sure about the Ferrari 275 GTB
. i know that the Michelin XWX
is the only vintage tire for that car now and without doubt it is an excellent tyre. I believe that the full profile XWX was developed in 1966 so the 275 GTB tire 205VR14 Michelin XWX
what is well known is that low profile tyres like the 205/70VR14 tyre were not developed untill the end of 1968, and i don't believe Ferrari started useing them untill 1970. which is why if you see a 275 GTB fitting a 205/70VR14 it looks lost in the wheel arch, and a 250 GTE fitting a 185/70VR15 looks as wrong as a 500 SuperFast with a 205/70VR15.
So I believe that Ferrari in the 60's fitted either:
185VR16 Pirelli Cinturato CA67 for which there is no low profile equivalent.
185Vr15 Pirelli Cinturato CA67 the low profile eqivalent would be 205/70VR15 Michelin XWX
205VR15 CN72 Pirelli Cinturato HS The more modern equivalent would be 215/70VR15 Michelin XWX
All these tyres are in current production. In my mind if you are going to fit a 70% low profile tyre of the 70's to upgrade a 60's car it just has to be Michelin XWX. because that is what the XWX is for. it was a tire development in the 60's designed to compliment the top notch cars of the day, And the 70% profile XWX was developed alongside these cars to improve the grip. fitting a tyre like the modern Pirelli P4000 will spoil the handling of such a car because it was developed in a different time. The P4000 is an excellent tyre and when they fitted them to XJ6 Jaguars in the 90's it was an appropriate upgrade to suit the subtle developments the car had gone through, so it would not compliment a car of the 60's.
(and they don't look right on a 60's car)
I would love to know your views