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Last Post 18 Feb 2015 11:09 AM by  DeltaV
Tire size advice- STS Integra
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DeltaV
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23 Jan 2015 02:39 PM
    I'm currently embarking on a project to build a 98 Integra RS for STS. I'm stuck between two tire sizes: 205/50/15 and 225/45/16, both on a 7.5in wheel. The way I see it:

    205/50/15: Shorter gearing, lighter, come to temperature quicker, cheaper. Not as many tire choices, larger sidewall, risk of overheating with the heavier car.

    225/45/16: More tire choices, more tire for the heavier car, shorter sidewall. Taller gearing, heavier, may take a few runs to come to temp, more expensive.

    Anything I'm missing? Thoughts, advice?

    ron
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    23 Jan 2015 03:56 PM
    205-50-15 There are plenty of tires in this size to choose from and if they don't provide this size they usually have a 225-45-15 available. Don't just look at the weight of the rims but also the weight of the tire you are putting on the combined savings could be 6-7 lbs per corner.
    Ron Williams
    sgreer78
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    23 Jan 2015 05:59 PM
    Not related to tires, but note there is no longer STC. It's STS only now.
    DeltaV
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    24 Jan 2015 10:38 AM
    Fixed!
    mball
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    05 Feb 2015 09:17 AM
    I ran 225/45 Hankooks on 15"x7.5" TRMotorsport wheels on my ST* Integra a few years ago. I had issues getting the rear tires warm. The fronts warmed up quickly and had a lot of grip. Yuou may want to consider a 225 up front and a 205 or 195 in the rear. It should be easier to get skinnier rears up to temperature.
    DeltaV
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    09 Feb 2015 04:09 PM
    Thanks for the advice. I would love to run a 225/15/45 on a 15x7.5 wheel but there are no ST* tires in that size, currently and 15x7.5 wheels are scarce as well. I'm just worried about not having enough tire under the car on a 205. It would be fine on a Miata or Civic but I'm probably rolling up to the line at 2500-2600 lb...
    DeltaV
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    11 Feb 2015 03:00 PM
    Welp, Toyo comes through with a 225/45/15 R1R. Problem solved.
    wbjones
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    12 Feb 2015 09:26 AM
    assuming the Toyo is ever made available and isn't then instantly put on the banned tire list :(
    mball
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    18 Feb 2015 08:41 AM

    Posted By <a href='http://www.sccaforums.com/user-profile/userid/48154' class='af-profile-link'>DeltaV</a> on 09 Feb 2015 04:09 PM
    Thanks for the advice. I would love to run a 225/15/45 on a 15x7.5 wheel but there are no ST* tires in that size, currently and 15x7.5 wheels are scarce as well. I'm just worried about not having enough tire under the car on a 205. It would be fine on a Miata or Civic but I'm probably rolling up to the line at 2500-2600 lb...


    I think that the Integra needs 225s up front. What suspension are you using? My car had the non adjustable Progess coil overs with 500 lbs springs all around, a Progress 24mm rear sway bar, and energy suspension bushings everywhere. The TR wheels were the Miata spec with a 42 offset. The car handled great and was very neutral.
    DeltaV
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    18 Feb 2015 11:09 AM

    Posted By mball on 18 Feb 2015 08:41 AM
    I think that the Integra needs 225s up front. What suspension are you using? My car had the non adjustable Progess coil overs with 500 lbs springs all around, a Progress 24mm rear sway bar, and energy suspension bushings everywhere. The TR wheels were the Miata spec with a 42 offset. The car handled great and was very neutral.


    I'm planning on running a Koni/Ground Control setup. I'm not sure on spring rates or valving yet. The trend seems to be towards heavier springs and corresponding valving, and this is a autox only car so that may work out. I'm leaning towards a Whiteline 22mm rear bar because I've used Whiteline before and I like their adjustment better than the Progress (bolt holes vs sliding in a slot). I just looked up those TRs, they should be perfect. Thanks!
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