tire size

Discussion in 'Wheels and Tires' started by Racer_X, Nov 5, 2009.

  1. Racer_X

    Racer_X Maverick Hugger

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    is it the tire width or the tire hight that affects the mpgs. on the back i have 195/60/14 tires and would like to swicht to 235/60/14 size tires.
     
    Racer_X, Nov 5, 2009
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  2. maverick75

    maverick75 Gotta Love Mavs!

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    Im pretty sure its both! taller tires will give you more mph, and skinnier tires spin with less restriction, thats why economy cars come with them.
     
    maverick75, Nov 5, 2009
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  3. Racer_X

    Racer_X Maverick Hugger

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    well maybe i sholud go down to 225 instead
     
    Racer_X, Nov 5, 2009
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  4. mercgt73

    mercgt73 Member

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    remember that as you increase your tire width, you need to lower your aspect ratio if you want to keep the same tire height.
     
    mercgt73, Nov 5, 2009
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  5. Racer_X

    Racer_X Maverick Hugger

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    ???aspect ratio???
     
    Racer_X, Nov 6, 2009
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  6. mercgt73

    mercgt73 Member

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    aspect ratio is the second number in the tire size. its the ratio (percentage) of sidewall height to tire width.

    235/60 will have a width of 235millimeters with a sidewall height of 60% of 235 millimeters. So, if you go up with width, then your sidewall will increase along with it if you stay at 60.

    play with this: http://www.miata.net/garage/tirecalc.html
     
    mercgt73, Nov 8, 2009
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