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250 GT California Tyres

Discussion in 'Vintage (thru 365 GTC4)' started by Longstone Tyres, Jul 15, 2019.

  1. Longstone Tyres

    Longstone Tyres Formula 3
    Sponsor

    Feb 2, 2006
    1,119
    Full Name:
    Dougal
    Hi

    I wrote this text:-

    "
    FERRARI 250 GT CALIFORNIA
    RW 3264, 5.5”X16 Borrani wheels. These LWB California Spyders cars left the factory with 600-16 Pirelli Stella Bianca. 185VR16 Pirelli Cinturato is also the other period option.
    • The later SWB 250 GT California Spyder wheel options 5.5” RW 3526 & RW 3687 with 6”X16 wheels. These post 1960 cars would predominantly fit 185VR16 Pirelli Cinturato. Some of the early cars may have had 600-16 Stella Bianca.
    • Some of these 250 GT California cars fitted 400mm Borranni wheels RW 3598 so they coulod fit the early radial tyre 175HR400 Pirelli Cinturato.
    • Tyre pressures for a 250GT California Spyder we have a recommendation from Pirelli in 1971 24 psi front and 28 psi rear, but this is for a 15” Cinturato 185VR15 CA67 HS, but we would employ the same pressutre to a 16” tyre of the same 185mm section. We would suggest increasing the pressure by 4psi for high speed heavily loaded use.
    FERRARI 250 GT CALIFORNIA SPIDER TYRES

    The Short Wheel base or Series 2 Ferrari 250 GT California Spider (SWB) fitted either the 175 HR 400 PIRELLI CINTURATO ™ CA67, the 185 VR 15 PIRELLI CINTURATO ™ CA67 or the 165 HR 400 PIRELLI CINTURATO ™ CA67, depending on if you have 15" or 400mm Borrani Wheels. As well as being original these PIRELLI CINTURATO ™ offer the excellent build quality you expect from one of the worlds best tyre manufacturers.

    Some people like a wider tire on their 250GT California Spider, in which case the best tyres would be either 205/70 VR 15 Michelin XWX or 205/70 WR 15 PIRELLI CINTURATO ™ CN12. We would suggest that these cars will handle at their best on the tyres that Ferrari chose to fit them with."

    And put it on our web page for these cars https://www.longstonetyres.co.uk/classic-car-tyres/ferrari/250-gt-california.html#page=1

    what do you think?

    is it correct?

    have i missed some stuff?

    do you have some period pictures that would make it better?

    Do you have any build sheets that would look good on here?

    Would you recommend different tyre pressures?
     
  2. mechaniker

    mechaniker Formula Junior
    Rossa Subscribed Owner

    May 30, 2004
    415
    Well,

    best would be to buy Carricks and Nowaks California Books, there are some Foglio Montaggios inside.

    Some additions from my archive (not complete):

    LWB:
    Continental Tyres with RW 3526

    SWB:
    Mostly stated with 185/15 Pirelli Cinturato or no Tyre at all.

    Interestingly, most Californias shown at Autoshows had no Pirellis.

    Best,
    Mechaniker
     
  3. Longstone Tyres

    Longstone Tyres Formula 3
    Sponsor

    Feb 2, 2006
    1,119
    Full Name:
    Dougal
    I think in '50s America it would have been difficult to get Pirelli Stella Bianca, Cinturato or any radial as an after sales tyre, but they would have left the factory with them. I would think people had to just buy what ever was available when they needed replacing. 400mm would be nearly impossible and 600-16 they would probably just buy what ever their local tyre dealer sold to the XK Jaguars.

    I thought the long wheel base on 16 wheels would have had either
    https://www.longstonetyres.co.uk/tyres/600-16/600-16-pirelli-stella-bianca.html
    or
    https://www.longstonetyres.co.uk/tyres/600-16/185vr16-pirelli-cinturato-ca67.html
    maybe a
    https://www.longstonetyres.co.uk/tyres/600-16/185sr16-michelin-x.html.

    Certainly in Europe land some of the 250 GT cars were fitting RW 3598 https://www.borrani.com/catalog/product/view/id/216/s/borrani-wheel-rw-3598/category/1611/ so they could take advantage of Cinturato and its new progressive radial tyres. Ferrari were fitting https://www.borrani.com/catalog/product/view/id/1879/s/175hr400-pirelli-cinturato-ca67/category/1611/ which i am very pleased to say Pirelli are making again for us now.

    I am surprised that you think Ferrari were fitting Continentals in the '50s? Is there any references i can use for this. I'd love some pictures
     
  4. Longstone Tyres

    Longstone Tyres Formula 3
    Sponsor

    Feb 2, 2006
    1,119
    Full Name:
    Dougal
    Oh yes. what size Continental does it say?
     
  5. lancia

    lancia Formula Junior

    Jan 18, 2004
    327
    As Mechaniker suggests, reference George Carrick's book on the 250 California, which has several specifications comparison pages for the LWB that appear to be taken from factory assembly sheets. He notes LWB chassis 1293GT, 1497GT, and 1501GT as having Continental tires. The type of Continental is not stated. 1615GT is noted as Dunlop, 1699GT and 1715GT as Pirelli Cint. in the comparison. The size is not always stated. I am not aware of early 250GT having Michelin, but never say never. The very earliest LWB California's may also have had Englebert tires. The 250 GT Coupe 0989GT was shown at the 1958 Paris Salon with Englebert tires. The special Coupe 1017GT at the Turin show has Pirelli tires in the photos, but by tread they are not Cinturato and don't look like Stelvio either. Perhaps another bias-ply Pirelli. I would be careful not to make broad assumptions regarding original tires, as variety is demonstrated in the late 1950s. While the Stella Bianca as newly offered looks to have the same tread pattern as the.Pirelli Stevio, period photos often show the "Stelvio" tire markings on Ferraris through the mid-50s where applicable. The newly produced Stella Bianca Corsa is still welcome in the spirit of the Stelvio - likely close as you will get.
     
  6. mechaniker

    mechaniker Formula Junior
    Rossa Subscribed Owner

    May 30, 2004
    415
    There is no size mentioned in the Foglio Montaggio regarding the Continental Tyres.

    To be „easy“, the Foglio Montaggio says, wich rim is correct. Sometimes there is a Tyremanufacturer stated, and sometimes even with size. To assume or rely on the Borrani suggestions is just speculating (regarding the rims).
     
    Lemacc likes this.
  7. Longstone Tyres

    Longstone Tyres Formula 3
    Sponsor

    Feb 2, 2006
    1,119
    Full Name:
    Dougal
    Ha ha. I would have thought, to state the brand seems funny with out stating what size. you would think the size would have been the more useful data.

    The Dunlop is not made any more. Iit would probably have been this one https://www.longstonetyres.co.uk/tyres/600-16/600h16-dunlop-rs5.html but sadly Dunlop dopn't make any more historic road tyres.

    They do make a 600-16 Racing tyre https://www.longstonetyres.co.uk/tyres/600-16/600x16-r5-dunlop-racing.html This is road legal. Great fun in the dry, but i wouldn't recommend it as a road tyre, as the performance in the wet is very exciting. that tread pattern came out in 1958

    The Englebert is no longer made. Michelin do however make this https://www.longstonetyres.co.uk/tyres/600-16/600r16-michelin-pilot-x.html which looks pretty close, but i have no doubt in recomending this as an excellent radial tyre in this size, where Michelin have made an excellent job of making it look like the Englebert, but done some subtle clever things in the tread design to make it quieter and an all round better tyre.

    do you have that picture to hand that i could look at?

    Agreed. I would suggest, specially with Ferrari. My recomendations tend to based on any knowledge i have of OE and knowledge of what is around today that would be suitable. sometimes developed from finding the OE tyres, hoefully knowing the dimensions of the tyre and then making a suggestion based on what cuurrently produced tyres have similar dimensions, and a suitable carcass structure.

     
  8. Longstone Tyres

    Longstone Tyres Formula 3
    Sponsor

    Feb 2, 2006
    1,119
    Full Name:
    Dougal
    The Borrani suggestions are difficult in that to print the book they had to make a generalization. Our web site https://www.borrani.com/ferrari-wheels/250-gt-cabriolet-s1.html is constantly being up dated. so any Borrani information you have can go on here. to be frank that web site would be much better if the chap in our office had time to put all the stuff on the web site that he finds out. But if you know stuff we will put it up. If you have relevant build sheets we will put them on there. the intention is for our web site to be correct.
     

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