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  • tire size question

    what size tire would fit 18X8 wheels and not interfere w/ my spedometer reading too much. just wondering b/c i have four brand new 18" Eagle Type 077's sitting in my kitchen w/ no tires. [img]graemlins/crybaby.gif[/img]

    [img]graemlins/burnout.gif[/img] [img]graemlins/burnout.gif[/img]

  • #2
    I think that you'll have speedo problems with the 18's PERIOD!! Just get the lowest profile you can geat wawy with and it should be minimal. Something like 245/40 or 245/35's. Those can get really expensive though!!
    <b><i>1999 Pewter Trans Am M6 - Stock for now...<br />296.6 RWHP and 310.6 RWTQ</i></b> -<i>SOLD</i><p><i>\"There are vast amounts of money to be made in the sevice of the Lord!\"</i><br /><i>1994 Green Camaro M5 - <b>SOLD</b></i><p><br /><b><i>Associate of VENOM-VI</i></b>

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    • #3
      Im using 255-35-18s on my car and I put it up next to my stock wheels(235-55-16). The 18s are about an inch lower believe it or not. My tires cost around 150 bucks each from www.discounttiredirect.com

      [ January 15, 2002: Message edited by: shortdog273 ]</p>
      <b>99 Camaro Z28 A4</b><br />R.I.P. 00 Firebird 3.8<br />14.89 @ 90, 2.03 60\'

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      • #4
        The 235/55-16 diameter in mm is about:

        16X25.4 + 235X.55X2 (sidewalls) = 406.4 + 258.4 = 664.8mm

        The 255/35-18s are:

        18X25.4 + 255X.35X2 = 457.2 + 178.5 = 635.2mm

        Yep, about an inch and a quarter smaller.

        You can run calculations like this or go to the tire manufacturers website and get the diameter for the stock tires and the tires you're interested in. That is more accurate, since the numbers are approximate.
        2000 Firebird convert, chameleon/tan, M5, Y87, TCS, BMR tower brace and panhard, KBDD sfcs, 245/50-16 GSCs

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        • #5
          8" Wheel, max width = 255.

          Proper series for an 18" = P255/40R18

          All tires in that size are outrageously priced though, I personally wouldn't go past 17" since 18"+ tires are so expensive!

          P275/40R17s are still the best option IMO.
          2002 5-spd NBM Camaro
          Details: www.1lev6.com

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          • #6
            I was searching around today for a similar question. Try http://www.prestage.com/carmath/speedo.asp

            My question to you. Will 18's fit the firebird without rubbing?

            Thanks
            Zaino; FireBatCave Decals; Red Inside<br /><br />K&N Filter & Lid; Removed MAF screen; FRA; Raised Air Box; 180°F Stat; BMR STB; 3\" Catco & S-pipe; Borla Cat-Back; O2 Sim; HPPIII; NGK TR55s; Taylor 8mm wires<br /><br /> <a href=\"http://www.cardomain.com/id/cbass300\" target=\"_blank\">http://www.cardomain.com/id/cbass300</a>

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            • #7
              <blockquote>quote:</font><hr>Originally posted by Steve Caroccia:
              I was searching around today for a similar question. Try http://www.prestage.com/carmath/speedo.asp

              My question to you. Will 18's fit the firebird without rubbing?

              Thanks
              <hr></blockquote>

              It depends on the tire you get for it. Don't get anything higher than a 45 series tire for your car. I have my car lowered and it only rubs in the rear when I'm hitting dips in the road.
              <b>99 Camaro Z28 A4</b><br />R.I.P. 00 Firebird 3.8<br />14.89 @ 90, 2.03 60\'

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