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tire size for 17's

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  • tire size for 17's

    i got 17s and the 45 profile gives a bit of a rough ride can i go to a 50?
    SALLY #1991 2000 SVT CONTOUR (BLACK)
    CATBACK EXHAUST
    1999 FORD CONTOUR SE (SOLD)
    1998.5 SVT CONTOUR (SOLD)

  • #2
    The 2001-2002 Cougars with the optional OEM 17" wheels came from Ford with 215/50R-17 tires.

    But since your car is spec'd for 16's, your speedo might be pretty far off with a 50-series 17" tire on there.
    2000 3.0 Roush Cougar
    2013 Focus ST
    2002 MINI Cooper S
    2008 Mustang Bullitt # 5389

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    • #3
      You won't really feel a comfort difference bumping up one tire size. The tire will probably look too bulgy..... might even rub.
      *CLICK HERE ---> 1995 SE 3L WITH MATCHING TRAILER <--- CLICK HERE*
      30 Contour / Mystiques and counting......

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      • #4
        I was just curious cause I've heard it can cause ur speedometer to be off . I swapped rims and got some crappy bf Goodrich tires and very bad ride and traction in water compared to my hankook's.
        SALLY #1991 2000 SVT CONTOUR (BLACK)
        CATBACK EXHAUST
        1999 FORD CONTOUR SE (SOLD)
        1998.5 SVT CONTOUR (SOLD)

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        • #5
          215/45/17 is the correct size for a 17" wheel. If you want a 50 series tire, you will need to go down to a 205 width to keep the same sidewall height and not make your speedometer totally useless. What is the point in that?

          If your sidewalls are too stiff (like you have run flats or something) then just get different tires that are a little more luxury than performance oriented.
          Bob Johann
          SoundQ SVT
          1998 T-Red SVT Contour #3088
          5 correction: 6-Time Sound Quality Champion in IASCA, SLAP, and MECA
          2000 Silver Mystique LS V6ATX - SOLD 5/23/2013

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          • #6
            Originally posted by SoundQ SVT View Post
            215/45/17 is the correct size for a 17" wheel. If you want a 50 series tire, you will need to go down to a 205 width to keep the same sidewall height and not make your speedometer totally useless. What is the point in that?

            If your sidewalls are too stiff (like you have run flats or something) then just get different tires that are a little more luxury than performance oriented.
            Use either of the two frequently used tire sizing calculators - Tacoma site or Miata site. SoundQ is correct - dropping 10mm in cross section when increasing profile by a ration of 5.
            Yes, ride is more dependent on manufacturer differences in tire construction within a given size; instead of high performance summer or all-season, look at a general use all season tire or even a touring tire. Contact discounttiredirect.com and ask for Zach. This guy will not lead you astray.

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            • #7
              Like Bob said, 215/45/17 is the correct size.
              Jim Hahn
              1999 Tropic Green SVT Contour
              1996 T-Red Contour SE Reborn 4/6/04 Sold
              3.0L swap and Arizona Dyno Chip Turbo Kit
              364 whp, 410 wtq @ 4,700 rpm

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              • #8
                Yes, based on the tacomaworld.com tire calculator(http://www.tacomaworld.com/forum/tirecalc.php), here is what I see for comparison of speedo reading vs actual speed (comparing 205/55-16 vs 215/45-17):
                20 mph (32.19 km/h) 19.79 mph (31.85 km/h)
                25 mph (40.23 km/h) 24.74 mph (39.81 km/h)
                30 mph (48.28 km/h) 29.69 mph (47.78 km/h)
                35 mph (56.33 km/h) 34.63 mph (55.74 km/h)
                40 mph (64.37 km/h) 39.58 mph (63.7 km/h)
                45 mph (72.42 km/h) 44.53 mph (71.66 km/h)
                50 mph (80.47 km/h) 49.48 mph (79.63 km/h)
                55 mph (88.51 km/h) 54.43 mph (87.59 km/h)
                60 mph (96.56 km/h) 59.37 mph (95.55 km/h)
                65 mph (104.61 km/h) 64.32 mph (103.51 km/h)

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                • #9
                  I run a 225/45R17 for my summer tires and a 205/55R16 for my snows, here's the comparo for those;
                  '99 Spruce Green SE "Sport" 'Tour, 2.5L MTX...140K and currently dead. RIP
                  '98 Dark Blue SE Sport V6 MTX 123K and counting, all mods from old, plus D2's.
                  '03 5dr SVTF 110K the new DD, some mods, hoping not many more.

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