Wtb 215/35/zr18 tires

Discussion in 'Want To Buy : Cars/Parts' started by Sleeperwrx, May 28, 2013.

  1. Sleeperwrx
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    Sleeperwrx Active Member

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    I'm looking for a cheap set of 215/35/zr18 tires. Does anyone have or know where I can get cheap tires?
     
    Sleeperwrx, May 28, 2013
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  2. readymix
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    readymix ...Lest ye be trod upon... Staff Member

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    What car are they going on? If it is for your WRX, that isn't a good size to be running.
     
    readymix, May 28, 2013
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  3. readymix
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    readymix ...Lest ye be trod upon... Staff Member

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    If you just want cheap tires, you can always search craigslist for used tires
     
    readymix, May 28, 2013
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  4. Sleeperwrx
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    Sleeperwrx Active Member

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    Yeah it's for my Wrx. How isn't it good?
     
    Sleeperwrx, May 28, 2013
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  5. readymix
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    readymix ...Lest ye be trod upon... Staff Member

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    Because the circumference of the tire is off by 3 and a half inches. Making the rolling circumference 4.2% too small. For an 18, you should be a 225/40/18 for a 7.5" wide.
     
    readymix, May 28, 2013
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  6. Sleeperwrx
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    Sleeperwrx Active Member

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    Oh ok. Cause the tires that came with the rims I got are 215. Well if that's the case I think I might know someone who has some. Thanks
     
    Sleeperwrx, May 28, 2013
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  7. readymix
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    readymix ...Lest ye be trod upon... Staff Member

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    215 is the section width, the aspect ratio determines the sidewall height, and thusly the rolling circumference. You could probably run a 215/40/18, but the 35 aspect ratio makes the sidewall too short for that tire.
     
    readymix, May 28, 2013
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  8. Sleeperwrx
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    Sleeperwrx Active Member

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    But if the sidewall 35 is too short for 215, why do they have em? Or is just an all wheel thing?
     
    Sleeperwrx, May 28, 2013
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  9. predavore
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    predavore Well-Known Member

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    predavore, May 28, 2013
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  10. predavore
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    predavore Well-Known Member

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    These Subarus seem to have a speedo that reads a bit fast. So I actually run 235/40/18 and I'm about dead on.
     
    predavore, May 28, 2013
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  11. readymix
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    readymix ...Lest ye be trod upon... Staff Member

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    Stock reference size for tires for an Impreza is a 17x7.5 wheel with 225/45/17 tire. Your car never came with a 215/35/18. Maybe you purchased it with those on it, but that doesn't mean they are the correct size. And just because a 215/35/18 doesn't work on an Impreza doesn't mean it doesn't work on other cars.
    The speedometer on the Impreza is calibrated to a 225/45/17 tire's circumference on a 17x7.5 wheel. When you use the Miata.net calculator, the first thing you plug in is the reference size. The closest you can get to that circumference in an 18x7.5 wheel is a 225/40/18.
     
    readymix, May 28, 2013
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