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355 Tyre Sizes

Discussion in 'United Kingdom' started by subirg, Feb 24, 2004.

  1. subirg

    subirg F1 Rookie

    Dec 19, 2003
    3,878
    Cheshire
    Over on the US side of FChat, the recommended size for 355 rear tyres is 275/40/18 (OEM is 265/40/18). They reckon you only need to up the tyre pressures by a Psi to restore the handling balance.

    Seems like a good idea if a. you can get a better range of tyres in that size and b. the extra rear rubber adds a bit more grip.

    DOes anyone have any experience of fitting the larger rubber???
     
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  3. BigHead

    BigHead Formula Junior

    Oct 31, 2003
    992
    Outside of Boston
    Full Name:
    Dennis
    See this thread:
    http://ferrarichat.com/forum/showthread.php?t=6187&highlight=355+tire

    I ended up going with 295/35-18 in the rear - it is a perfect match without spacers or clearance problems. The aspect ratio on the rear is almost identical between the 265/40 and the 295/35. The wider tire offers slightly more rear grip, offsetting the factory inclination towards understeer. You'll also find a lot more tire selection in the 295/35, compared to the 265/40.

    That thread has an XL attachment with a tire size calculator you can download.

    vty,

    --Dennis
     
  4. kenyon

    kenyon F1 Rookie

    Oct 7, 2002
    2,836
    East Yorkshire
    Full Name:
    Justin Kenyon
    Bighead,

    What tyre size do you run on the front ?
    Do you have spacers on the front and what size ?
    What spacer size do you have on the back ?
     
  5. BigHead

    BigHead Formula Junior

    Oct 31, 2003
    992
    Outside of Boston
    Full Name:
    Dennis
    I run stock front, and no need for spacers in the back - the 295/35 fits just fine, as is....

    vty,

    --Dennis
     
  6. GOS 348

    GOS 348 Karting

    Jan 17, 2004
    108
    Edenbridge, Kent
    Full Name:
    Chris Gosling
    Subirg

    My brother runs 275/40/18 Toyos on the rear of his 355 Spider. No spacers needed.

    No adverse effect at FOC track days last year and a damn sight cheaper than OEM tyres.
     
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