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Rear tire sizes

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

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  1. emac

    emac Formula Junior
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    ernest
    #1 emac, Feb 16, 2015
    I know this has been posted before, but I thought I would throw it out to see if anyone had any new personal experience that may help my decision. Or at least reconfirm my thinking.

    Keeping front stock 225/40/18.

    I am going to buy Michelin Pilot super sports.

    Stock size 265/40/18 - Diameter 26.3"

    My car currently has 275/35/18 - diameter 25.6"

    I am considering 275/40/18 - Diameter 26.6"

    I like the look of the wider rear tire, and I am wondering if the stock tire may look narrow for me. But, I am kind of a stock guy, that thinks the car originally came with 265/40's for a reason. I think the 275/40 will be a closer diameter match to the stock tire, keeping the suspension setup normal. Michelins seem to be available in all three sizes.

    Car is stock and will be street driven. I just got the car and the tires are 10 years old, so I haven't felt comfortable pushing them at all. Matter of fact I am kind of scared of them. They feel hard as a rock, especially in the cooler temperatures. My seat of the pants makes me feel it has some oversteer tendencies.

    So, should I go with stock size or the 275/40?

    Thanks.

    ernest
     
  2. Drock28

    Drock28 Formula 3

    Jan 13, 2013
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    #2 Drock28, Feb 16, 2015
    you can actually go 295/35/18 in the rear.. ive seen it in person looks great..!
    and seems several owners here are on this setup..without issue.

    thats what i'll be doing.. and will also go 235/40/18 in front..
     
  3. Meister

    Meister F1 Veteran
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    #3 Meister, Feb 16, 2015
    I have 275/40/18 on the rear of my 348. I like how it fills the wheel well (f to B) better than the lower 35 series tire.
     
  4. jimmym

    jimmym Formula 3

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    #4 jimmym, Feb 16, 2015
    Last edited by a moderator: Sep 7, 2017
  5. SoCal1

    SoCal1 F1 Veteran
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    #5 SoCal1, Feb 16, 2015
    I run Michlen 295/35/18 in the rear
     
  6. jimmym

    jimmym Formula 3

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    #6 jimmym, Feb 16, 2015
    Tim, my tires are Bridgestone. I am happy that I went with the wider rear tires. Gives the back of the car a more aggressive look.
     
  7. drbob101

    drbob101 F1 Rookie
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    #7 drbob101, Feb 16, 2015
    What are you guys using larger rears using for the fronts?
     
  8. Drock28

    Drock28 Formula 3

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    #8 Drock28, Feb 16, 2015
    from what ive seen/read.. those using wider rears are going 235/40/18 in front.

    when my car was in the shop there was another Berlinetta there
    with 235/40/18 and 295/35/18 looked great..!
     
  9. cavallo95

    cavallo95 Formula Junior

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    #9 cavallo95, Feb 16, 2015
    Last edited by a moderator: Sep 7, 2017
  10. emac

    emac Formula Junior
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    #10 emac, Feb 16, 2015
    That is wide! I am thinking about sticking with stock upfront and 275/40/18 rear. Compromise.
     
  11. lotusk

    lotusk Formula 3

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    #11 lotusk, Feb 16, 2015
    Nah

    Looks clumsy and ungainly
    Also affects handling .....
    OEM are fitted for a reason
     
  12. jimmym

    jimmym Formula 3

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    #12 jimmym, Feb 16, 2015
    Bob, I kept the 225/40/18's. Some have gone up to the 235's.
     
  13. jimmym

    jimmym Formula 3

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    #13 jimmym, Feb 16, 2015
    Last edited by a moderator: Sep 7, 2017
  14. drbob101

    drbob101 F1 Rookie
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    #14 drbob101, Feb 16, 2015
    Thanks Jimmy.

    Need tires this season and am pondering the size thing. I am inclined to just do the OEM sizing but open to opinions.
     
  15. emac

    emac Formula Junior
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    #15 emac, Feb 16, 2015
    Bob,
    I should be getting the tires mounted sometime this week. I went with 275/40 rear and 225/40 front. I will post some pics and let you know how it drives, so you can have something to ponder as you thaw out.
     
  16. drbob101

    drbob101 F1 Rookie
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    #16 drbob101, Feb 16, 2015
    Ok Ernest. Look forward to hearing about them and seeing them. Im not doing them until the frozen tundra thaws which may be August. Ugh.

    @ degrees on the outside thermometer this morning.
     
  17. John_K_348

    John_K_348 F1 Rookie

    Sep 20, 2013
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    #17 John_K_348, Feb 16, 2015
    I considered going up a size in front on my new 18s because the recommended size would actually stand a little shorter top to bottom and have a smaller percentage side wall. The problem with going up a size is with the increased width, you will likely rub the fender liner at full lock. The guy at Firestone up here showed me that. When going up a wheel size in width, the profile matching numbers may look a little odd because the sidewall is not a perfect match front to back. But you need more meat on the rears to put the power down. You also need room to steer up front. That's why they are staggered in the first place. I have learned not to let it bother me and it will look much better when I lower the suspension a bit. The Enzo has a matched profile set up.
     
  18. joshtownsend

    joshtownsend Formula Junior

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    #18 joshtownsend, Feb 16, 2015
    Your right... Challenge wheels have no business with a 295 on the back..
     
  19. cavallo95

    cavallo95 Formula Junior

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    #19 cavallo95, Feb 16, 2015
    Last edited by a moderator: Sep 7, 2017
  20. cavallo95

    cavallo95 Formula Junior

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    #20 cavallo95, Feb 16, 2015
    My wheels do not stick out watsoever, it looks great , I personally think the stock 265s are to small.
     
  21. GTSNJ

    GTSNJ Formula Junior

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    #21 GTSNJ, Feb 16, 2015
    285 35 18 pzero 225 40 front amazing much better feel.
     
  22. jimmym

    jimmym Formula 3

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    #22 jimmym, Feb 16, 2015
    Exactly. I have seen a car with the 285's on it. I thought they fit nice also.
     
  23. Kaivball

    Kaivball Three Time F1 World Champ
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    #23 Kaivball, Feb 16, 2015

    That's exactly my setup.

    [​IMG]

    Kai
     
  24. Kaivball

    Kaivball Three Time F1 World Champ
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    #24 Kaivball, Feb 16, 2015
    Ok that was a horrible picture

    [​IMG]

    Kai
     
  25. Kaivball

    Kaivball Three Time F1 World Champ
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    #25 Kaivball, Feb 16, 2015

    Nope.

    Kai
     
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