Rear tire sizes | Page 2 | FerrariChat

Rear tire sizes

Discussion in '348/355' started by emac, Feb 16, 2015.

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  1. Kaivball

    Kaivball Three Time F1 World Champ
    Owner

    Jan 11, 2007
    35,997
    Kalifornia

    Nope again.

    [​IMG]

    Kai
     
  2. John_K_348

    John_K_348 F1 Rookie

    Sep 20, 2013
    2,757
    Boston, MA
    Full Name:
    John E. Kenney
    By the Enzo matching, I meant the profile numbers match 40 front 40 rear, but the sidewall appears taller on the rear.
     
  3. mikster

    mikster Formula Junior

    Nov 11, 2003
    357
    LA
    Full Name:
    SLOMO
    295 to 305 fill the gap just right.
     
  4. emac

    emac Formula Junior
    Silver Subscribed

    Sep 14, 2014
    851
    upstate SC
    Full Name:
    ernest
    #29 emac, Feb 26, 2015
    Last edited by a moderator: Sep 7, 2017
    After an ice storm, then a snow storm that turned into a rain storm I got my tires mounted. I dropped the wheels off at the tire place and left them there for a week before I got back to get them. I got them to get the wheels repainted as well. What the heck, it is only money. New Michelin pilot super sports. Stock front, 275/40 rear.

    During the wait, I replaced the plugs and wires, pulled the brakes apart and fixed the squealing, worked on the parking brake, put in a new battery, cleaned and painted the tray, and did some general cleaning. I am replacing a couple of interior parts and have cleaned and painted them. That is a pain.

    I put the wheels on tonight and took it for a spin. All I can say is WOW. Now I realize what you guys are saying about how good these cars drive. My old tires had great tread, but were very old and hard as a rock.

    The new plugs and wires, really improve the idle, and the car pulls nice and strong. No SDL....fingers crossed. After several weeks of ownership and countless nights worried about my purchase, I can finally relax a little.

    I used to budget about 1K whenever I bought a used car to get it sorted. This one cost me about 2-3 grand (so far) but I have learned a ton and that is priceless.

    Here are some pics of the tires on the car.
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  5. jimmym

    jimmym Formula 3

    Sep 30, 2008
    1,993
    Northeast U.S.
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    Jim
    Ernest, the car looks nice with the new tires.
     
  6. cuneo

    cuneo Formula 3
    Silver Subscribed

    Nov 20, 2006
    2,484
    $2-3k to get her happy is nothing. Good work! The car looks great. Congrats!!!
     
  7. drbob101

    drbob101 F1 Rookie
    Owner Silver Subscribed

    Nov 26, 2012
    3,821
    Tinton Falls, NJ
    Full Name:
    Bob Ferraris
    Gorgeous car Earnest. Great work on getting things sorted

    New tires for me as soon as the salt and snow are gone. Now you make me have to decide on the rear size. ��
     
  8. LetsJet

    LetsJet F1 Veteran
    Owner

    May 24, 2004
    9,334
    DC/LA/Paris/Haleiwa
    Full Name:
    Mr.
    I realize you made your decision...

    But, for those that search and find this thread at some later point, yes, this has come up many times before.

    We all helped each other figure what the best setup is... Now, to each his own. You decide...

    But, there is a reason many are running 295/35/18 and will swear by it. Typically, we ran stock first and can tell real world difference. I run this with 15mm spacers (I think it's 15mm) and my mechanic put in some neg camber. She runs like she should be on a track. Now, I don't drive that way. But, she sticks in the rear.... Also, in case you're wondering, the tires fit inside the well.

    Enjoy your car...looks good.
     
  9. cavallo95

    cavallo95 Formula Junior

    Jan 23, 2007
    272
    chicago
    I agree 100%
     
  10. Subarubrat

    Subarubrat Formula 3

    Apr 1, 2009
    2,072
    VA
    Full Name:
    Scott
    I have the same experience running 295s rear and 235s front, much improved ability to not break free on the 1st to 2nd shift and much more planted overall. But remember, this is the internet and speculation and pontification count more than actual experience (not referring to emac btw).
     
  11. drbob101

    drbob101 F1 Rookie
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    Nov 26, 2012
    3,821
    Tinton Falls, NJ
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    Bob Ferraris
    Ok I am confused. How does a 295/35 fill out the wheel well more if it is slightly smaller in diameter?
     
  12. GTSNJ

    GTSNJ Formula Junior

    Jan 18, 2015
    478
    Because its wider overall? The 35 is an aspect ratio so a 35 sidewall on a 295 is taller than one on a 265. However the rolling diameter may be smaller but the tire is wider filling out the well.

    I had pirelli on my other car the rolling diameter was innacurate from tire rack, I put the 265 40 18 ps2 next to the 285 35 18 pzero and they looked to be almost identical on height (both tires off the ground
     
  13. GTSNJ

    GTSNJ Formula Junior

    Jan 18, 2015
    478
    Also a 285 Michelin may be wider than a 285 from pirelli . I have seen deviations in the same size tires up to a 1/2 inch from different manufacturers although they were the same size on paper
     
  14. Steve355F1

    Steve355F1 F1 World Champ
    Owner

    Aug 26, 2011
    17,180
    Adelaide, South Aust
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    Steve
    I'm with you, brother.

    Factory sizes on the factory rims.

    If the Challenge cars have larger tyres, then they are what should be on Challenge rims.

    Never the twain shall meet.
     
  15. GTO Joe

    GTO Joe Formula 3
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    Feb 15, 2013
    1,002
    Charlotte, NC
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    Joseph Troutwine
    Dead on. I have seen the same real world difference between mfg. I think it has to do with the way the tread shoulder is designed.
     
  16. gmbjr

    gmbjr Karting

    Dec 18, 2013
    67
    Austin, TX
    The Michelins run a little wider from what I've seen (265 vs. 265).
     
  17. jimmym

    jimmym Formula 3

    Sep 30, 2008
    1,993
    Northeast U.S.
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    Jim
    The OEM size is tucked in a little more. I am talking about width, not height for the 295's. The 295 being a little wider fills out the wheel wells a little better, but will not stick out past the fenders. For height, the 295's are only .2" smaller, so the side profile of the car will not change from the OEM appearance.
     
  18. jimmym

    jimmym Formula 3

    Sep 30, 2008
    1,993
    Northeast U.S.
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    Jim
    I agree that there is definitely small variations between tire manufacturers.
     
  19. drbob101

    drbob101 F1 Rookie
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    Nov 26, 2012
    3,821
    Tinton Falls, NJ
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    Bob Ferraris
    OK so the fill you are referring to is laterally not vertically.
     
  20. jimmym

    jimmym Formula 3

    Sep 30, 2008
    1,993
    Northeast U.S.
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    Jim
    That is correct. With the OEM size the rear of the car looks a little malnourished. I also believe the sidewall on the 295 is a closer match to the 225 sidewall. The 265 sidewall is taller than the 225 if I remember correctly, or should I say it was on my Michelin Pilot Sports. With the added width and the shorter sidewall the rear end feels more stable to me. Others can chime in on this. I also chose a tire model that had the 265 and 295's available. That way if I didn't like it, all I would have to do is switch the rear tires back to the 265's, and either rear set would match the fronts.
     
  21. FerrariFL

    FerrariFL Formula Junior

    Dec 2, 2012
    526
    What is the OEM size for front and back on 355?
     
  22. Yassa

    Yassa Formula 3
    Silver Subscribed

    May 23, 2011
    1,266
    London
    Full Name:
    Dr Yassa Hughes
    Front: 225/40ZR 18
    Back: 265/40ZR 18
     
  23. Kaivball

    Kaivball Three Time F1 World Champ
    Owner

    Jan 11, 2007
    35,997
    Kalifornia

    Correct.
    The 295has very similar height to the 265 and is the best fit OEM like fit... But wider.
    Speedo doesn't change.

    Kai
     
  24. Subarubrat

    Subarubrat Formula 3

    Apr 1, 2009
    2,072
    VA
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    Scott
    +1 on the 295, more grip and same side wall, no downside.
     
  25. Steve355F1

    Steve355F1 F1 World Champ
    Owner

    Aug 26, 2011
    17,180
    Adelaide, South Aust
    Full Name:
    Steve
    Except for overall handling.

    Why didn't Ferrari put 295s on the rear?
     

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