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Old 10-17-2012, 07:32 PM   #1
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What Tire Sizes Work

I have read the post here Ford Focus Wheel & Tire Information and it was very informative about tire sizes, however I'm looking to see if either a 215/70R/15 or 235/70R/16 winter tires would fit on my car as I'm able to get them for free.

My car is a 2004 Ford Focus SVT 5 door.


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Old 10-17-2012, 07:39 PM   #2
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Quote:
Originally Posted by josh6025 View Post
I have read the post here Ford Focus Wheel & Tire Information and it was very informative about tire sizes, however I'm looking to see if either a 215/70R/15 or 235/70R/16 winter tires would fit on my car as I'm able to get them for free.

My car is a 2004 Ford Focus SVT 5 door.
15'' wheels wouldn't fit over your 300mm front brakes. Those 235's are tall truck tire size.
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Old 10-17-2012, 07:48 PM   #3
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15'' wheels wouldn't fit over your 300mm front brakes. Those 235's are tall truck tire size.
So the 235 is too tall than for my car?
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Old 10-17-2012, 08:02 PM   #4
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Originally Posted by josh6025 View Post
So the 235 is too tall than for my car?
i like to use this calc for this kind of stuff:
http://www.rimsntires.com/specs.jsp

Your stock tire size is 215/45/17. Try to find a 16" that will be about the same height. 205/50/16 is a common focus size and is slightly shorter, 195/55/16 is closer. There are only a handful of 15" wheels that will clear your front brakes and may need spacers anyway
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Old 10-17-2012, 09:40 PM   #5
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Neither of those tire sizes is close to being a reasonable fit (free or not). The stock tire diameter for an SVT is 24.6 inches. The two you identified are 26.9 and 29 inches in diameter. A very common snow tire size used on an SVT (and other Foci) is 205/55-16.
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Old 10-19-2012, 12:22 AM   #6
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40% of width for sidewall IIRC?
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Old 10-19-2012, 09:52 AM   #7
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40% of width for sidewall IIRC?
Yes, the "aspect ratio" is used as a percentage to determine sidewall height. Multiply the width of the tire by the ratio (as a percentage, .40, .45, .50, etc) to get the sidewall height in mm. Divide the result by 25.4 to convert to inches. Example: a 215/45-17 tires sidewall height is 215 x .45 = 96.75mm (96.75 / 25.4 = 3.81 inches).
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