Campagnola 14" X 6.5" Wheels

Hub size? If 42 hubs my guess is 330 GT 2+2.

 

330 2+2 is a 15" wheel I believe, not 14". It likely a type 32 hub, I assume square-hole. It is the shallow spare tire wheel size for 275GTB long-nose to fit in the trunk, even though the regular size is 7 x 14 for the long-nose with square-hole magnesium wheels. The earlier starburst wheels are I think 6.5 x 14. Spelling 'Campagnolo'.

 

Correct, 2+2 is a 15 inch wheel with 42 hubs. Wasn't there an earlier version of the square hole 14" Campy on 275 2 cams? It had more of bowl shape to it than the later GTC style.

 

According to the factory build sheets, many early long nose 275 GTB's were equipped with 6 1/2 x 14 inch alloy wheels.

 

Dyke, I understand yes some early long-nose still had the starburst 6.5 x 14 - example the Paris Salon car, 1965 - photo in Prunet's Road Cars book. Have you seen the square-hole in that size, used all around on the GTB, in other than just the spare application?

 

Here's an Alloy 275 GTB Long Nose #07887 with Starburst alloys: 1965 Ferrari 275 GTB Long Nose Alloy | Gooding & Company

 

I have never personally seen a GTB with a different size spare wheel. I am very familiar with the problems getting the spare tire out of the trunk on some cars, but never encountered a original car with a different size spare wheel. In any case, the wheel size is not the problem, it is the tire size. Most early GTB's had 195x14 tires. These will clear the trunk lip. I have seen cars with 6 1/2 inch Compagnolos. The Build Sheets for the long nose cars do not indicate the wheel manufacturer, only the size and if alloy or wire construction.

 

My 275 GTS has a set 6 1/2 inch, square hole, Campagnolos. I also have a set of 6 1/2 inch Borranis which are the correct size for the GTS.

 

Thanks Dyke. I've seen a number of late 275GTB's anyway with the narrower 6.5 inch square-hole spare wheel and 7 inch at the four corners, not definitive, just general observation. I believe the both the starburst and the square hole mags are Campagnolo.

 

Lancia: You are correct, both starburst and square hole are Compagnolo.

 

Lancia: As to the cars with four 7" and one 6 1/2" wheels, I would suspect that, at some time, the "road" wheels were replaced/upgraded to 7". leaving the original spare untouched.

 

In 275GTB's restoration thread, there is a reference to the tires not fitting into the spare well with 205/14's but fitting with 190/14's. This seems unlikely, but is there any chance that Ferrari fitted the 275's with a 6 1/2" wheel / 190 tire for the spare and 7" wheel / 205 tire for the road tires?

 

I have NEVER seen a shread of evidence that the spare wheel was different from the road wheels in any street Ferrari from this era. 195 tires WILL fit into the trunk, while 205's will only fit when the air pressure is below 10 psi.

 

Thanks Dyke. I didn't think it was likely, but I've never heard of a case where the spare didn't fit when inflated so I thought it might be a possibility.

 

I don't know of any manufacturer making a 195VR14 but the 205VR14 Michelin XWX is available.
Some time ago i contacted Michelin to ask if the size of the 205VR14 XWX had increased because some cars struggled to fit them, and they say not. but i think the answer is that some cars did as you say fit a smaller tyre.
I have a 1969 car specification book which lists the 275 G.T. Berlinetta and 275 G.T. Spyder as fitting 185-14 in 1965 and 1966. I might mention that this is an English insurance book. UK fitment could be different. My fitment guides that i have from various different tyre manufacturers just state 205VR14.

 

To ensure uniform wear the 275 GTB and GTS Manual says to rotate the front and rear wheels AND the spare. If the spare was a different size the manual would not recommend this, imo.
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Steve; Great catch, and many thanks to you. I think you have just closed the case on this issue.

 

is rotating in a new tire with 3 used tires a good idea? did anybody actually do this?

 

Looking at Steve's diagram, is it really a good idea to reverse the rotation of a radial tire? Thanks.

john

 

John: Experts opinions are all over the place on this subject. While I generally do not reverse the rotation of radials, many times I have done it for various reasons and NEVER had a problem.

 

Thanks Dyke, back in the 1980's I spun an XZX backwards on an MGB, it peeled off the tread at speed--what follwed was pretty scary. It prbabaly was a bad tire and had nothing to do with the reverse rotation, but since then I have avoided reversing radials.

john

 

John: Your problem was purely political! A French tire on a British car. You know the French and British have never got along together!

 

Brilliant! I knew someone smarter than me would come along some day and figure it all out.

john

 

The problem is that this British car originally fitted an Italian tyre. 165HR14 Cinturato
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