Official Meaty fitment / Functional thread

Discussion in 'Suspension And Brakes' started by shad2fast4u, Jan 23, 2014.

  1. mazda_lexus

    mazda_lexus Well-Known Member

    Messages:
    204
    I have the stock rims, is this a good size to get since my stock tires are bald af now


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  2. webby
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    Messages:
    49,523
    Yeah. 225/45 or 235/40 are both options if you want a little wider tire.
     
  3. mazda_lexus

    mazda_lexus Well-Known Member

    Messages:
    204
    Yeah I want wider before I go lower later..better grip I suppose ? I wish I knew more about tires and wheels lol


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  4. webby
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    49,523
    Well stock was 215 wide on the 2012 si.
    215/45-17

    The first number “215” is the width in millimeters.

    215mm or like 8.47 inches wide.
    225mm is 8.86 inches wide
    235mm is 9.25 inches wide

    So going from a 215 tire to a 235 is roughly 3/4” wider in total. Since the tire will center on the rim, you’re essentially 3/8” wider on the inside and 3/8” wider on outside towards the fender.

    You can look at comparisons on sites like
    https://tiresize.com/comparison/

    It’ll let you put in the stock size, and then other sizes to compare widths and diameter. The diameter is the big thing to keep a look at so that the new tires don’t mess up your speedometer reading. A tire too tall or short will make your speedo inaccurate. Those sizes mentioned in my last post would work for you though.
     
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  5. mazda_lexus

    mazda_lexus Well-Known Member

    Messages:
    204
    You’re the best


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  6. dwmilton

    dwmilton Well-Known Member

    Messages:
    68
    Location:
    El Paso, TX
    Vehicle Model:
    Si
    Body Style:
    Sedan
    I've been doing a lot of thinking about going to a meaty setup for DD, and wanted opinion/guidance about fit. I've got all-seasons on the OE wheels (18x7.5 +47), and some new Conti Extreme Sports on Konig Inception 18x8 +40 wheels for summer/autocross. Both tire sets are 225/40-18.

    I like how the Konigs sit more flush than the OE wheels, but want a much lighter wheel and go to 17" for a little more sidewall, for DD.

    I like the Konig Rennform and Ultraform, from what I've seen; and wonder how a 17x8 +45 would look wrapped in 245/40-17 Conti DWS 06s. I'm thinking these wheels would fall between the OEs and the Inceptions in "flushness", but feel the meaty tire could use the room. I know these will be very slightly shorter overall than the 18s, but I'm not concerned about the difference. Wanting 245/40 over 225/45 for more rubber on the road, and know that's the max a 17x8 can handle safely.

    I'm on Swift Spec-Rs, and have the SPC rear camber arms installed.

    Thought, opinion, guidance from those that have walked this path already?
     
  7. Safe Gabe

    Safe Gabe Well-Known Member

    Messages:
    323
    Location:
    San Francisco, CA
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    235/40/17 will be best for that setup. I've had all sorts of setups on my car, from 215's all the way to 255's. 235 is the happy middle ground.
     
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  8. Chambers805

    Chambers805 Well-Known Member

    Messages:
    66
    Location:
    Santa Maria, CA
    Vehicle Model:
    Civic SI
    Body Style:
    Coupe
    Straight MEAT!
    [​IMG]
     
  9. webby
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    49,523
    specs of your setup?
     
  10. Chambers805

    Chambers805 Well-Known Member

    Messages:
    66
    Location:
    Santa Maria, CA
    Vehicle Model:
    Civic SI
    Body Style:
    Coupe
    I'm running Konig Hypergrams in 17x9's +25 offset wrapped in Federal 595RR 255/40's. I also have Godspeed 2 way monomax coilovers running 12kg front and 14kg rear spring rates and progress 24mm RSB. Also all the Sirimoto and FKXRacing strut bars and under chassis braces.
     
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  11. dwmilton

    dwmilton Well-Known Member

    Messages:
    68
    Location:
    El Paso, TX
    Vehicle Model:
    Si
    Body Style:
    Sedan
    Gabe, with that said, would +45 or +35 offset work best on a 17x8” wheel?
     
    Last edited: Dec 25, 2017
  12. dpetro1

    dpetro1 Well-Known Member

    Messages:
    401
    Location:
    Catonsville, MD
    Either should work fine. 235/40 is smaller than stock so you get a little more clearance.

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  13. dwmilton

    dwmilton Well-Known Member

    Messages:
    68
    Location:
    El Paso, TX
    Vehicle Model:
    Si
    Body Style:
    Sedan
    Thanks for that! I’m wondering how the +35 will look...I want close to flush, but no poke, hellaflush, or whatever.
     
  14. Safe Gabe

    Safe Gabe Well-Known Member

    Messages:
    323
    Location:
    San Francisco, CA
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    Here's my car with a 17x8 +35 with a 235/40/17:
    [​IMG]

    Only had remove the upper most fender tab of the front fender liner. No drama in the rear.
     
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  15. dpetro1

    dpetro1 Well-Known Member

    Messages:
    401
    Location:
    Catonsville, MD
    17x8 +35 225/45 tire[​IMG][​IMG]

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  16. dwmilton

    dwmilton Well-Known Member

    Messages:
    68
    Location:
    El Paso, TX
    Vehicle Model:
    Si
    Body Style:
    Sedan
    Thanks very much guys! Y’all really help me zero in on what fits the look I want!

    How much are the cars lowered in those photos? I’m only dropped like 1.2” front, and 1” rear (Swift springs).
     
  17. webby
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    Messages:
    49,523
    you'd be closer to the white sedan pictured above
     
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  18. dpetro1

    dpetro1 Well-Known Member

    Messages:
    401
    Location:
    Catonsville, MD
    Yep, I'm on tein coilovers. Maybe 1.5" drop.

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  19. dwmilton

    dwmilton Well-Known Member

    Messages:
    68
    Location:
    El Paso, TX
    Vehicle Model:
    Si
    Body Style:
    Sedan
    Awesome! Thanks again
     
  20. bauer311
    • Supporting Member

    bauer311 Supporting Member

    Messages:
    2,210
    Location:
    fountain, co
    Vehicle Model:
    civic ex
    Body Style:
    coupe
    Has anyone got a picture of say.....a +20 offset on a coupe? I've got some...ideas. I know I'll have to run flares, so I'm ok with that. Just having a hard time finding pics
     

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