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295 vs 305 tire width

Discussion in '456/550/575' started by Cyphur01, Feb 27, 2012.

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  1. Cyphur01

    Cyphur01 Rookie

    Jan 23, 2012
    36
    Keller, TX
    Full Name:
    Nick Johnson
    #1 Cyphur01, Feb 27, 2012
    Hi guys need some advice. Will be purchasing some 19" Hre p47s in silver with offset for 456gt. Now need to know tire width. Wheels will be 9" front 10.5" rear. Width for front will be standard 255 35 r 19. Now on to the back... Should I go with 295 30 r19 or 305 30 r19? The 295 offer the exact same rolling diameter as the fronts where the 305s change the rolling diameter by a small amount. The speedo would also not be affected by the 295. Which width tire would you recommend? Our tuner recommended 285 30 r19 which seems very narrow to me.
     
  2. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,170
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #2 tazandjan, Feb 27, 2012
    Last edited: Feb 27, 2012
    C- You want 305/30 19s, which were OEM on the 575M and Superamerica for the 10.5Jx19" wheels. They are 26.20" in diameter vs the OEM size 255/35 19s, which are 26.03" in diameter. Close enough for Ferrari to choose them. Those are calculated diameters, by the way.

    I recommend the Michelin Pilot Super Sport, the best high performance street tire out there right now.
     
  3. Matt@CampioniShop

    Matt@CampioniShop Karting
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    Jan 25, 2012
    242
    #3 Matt@CampioniShop, Feb 27, 2012
    +1 The PSS are in a league of their own right now!
     
  4. Cyphur01

    Cyphur01 Rookie

    Jan 23, 2012
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    Keller, TX
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    Nick Johnson
    #4 Cyphur01, Feb 27, 2012
    Last edited: Feb 27, 2012
    Definitely going with pilot super sports. Ok so 305 in the rear. Now front rim width. 575 has 8.5" width where hre recommends 9" for a 255 tire. Should I stick with 9" or scale back to 8.5"? Just want make sure that they will fit on a 95 456
     
  5. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,170
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #5 tazandjan, Feb 28, 2012
    Nick- I have 9" front rims and 255/35 19s, so would go with the 9" wheels. Receommended rim width range for the 255/35 19 PSS tire is 8.5"-10".
     
  6. Cyphur01

    Cyphur01 Rookie

    Jan 23, 2012
    36
    Keller, TX
    Full Name:
    Nick Johnson
    #6 Cyphur01, Feb 28, 2012
    Grazie Mille Taz
     

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