will it fit?

Just a guess, but I wouldn't expect that to rub. I haven't looked closely yet, but how much space do we have at full lock with the oem setup?
Didn't GRM run a 225 width on their fiesta?

That size will screw your rpm and speedometer...also will affect your acceleration since your adding weight and size in diameter. Go either 215 40 17 or 215 35 17. Do a search for tire calculators on google. 1010tires dot com and i think rimsntires is another site.

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ziggyst said:

hey guys, yes ive searched, but i need to know quick, anybody know if a 215/45 17 will clear? if it rubs a little thats ok lol

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Ask BRGT350 and Damon Cuccia. I think they both have fitted 215/45x17s on their STs.

stuntdoogie said:

That size will screw your rpm and speedometer...also will affect your acceleration since your adding weight and size in diameter. Go either 215 40 17 or 215 35 17. Do a search for tire calculators on google. 1010tires dot com and i think rimsntires is another site.

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Click to expand...

FWIW 215/45-17 would bump up effective gearing 5% and also cause a 5% speedo error...assuming the speedo is right to begin with, I have not checked mine against a GPS yet. 205/45-17 would affect gearing and the speedo by about 3%, assuming they fit I'll probably go to them when the OEM tires wear out in order to have more protection from the humungous potholes on some of the local back roads...or maybe sooner if I blow a tire or bend a rim before then :nailbiting:
A definite possibility, my GF had it happen on her base model Focus w/ 15" wheels.

ok well thanks guys, i only needed to know because i found a set of focus SES 17" multi-spokes with Continental Extreme contact dws on them for a really good price, and im going to use this as my winter set up

I found 215/45 17 to be very close to hitting the bumper cover and inner fenders. It also made the Fiesta look really tall. I run a P215/40 17 on my 2011 Fiesta and had them on the ST for a full week and had no issues. For winter, go with the smallest and narrowist wheel possible. It reduces your contact patch and provides great wheel protection. In the summer, wider is better and in the winter, narrow is best. You will also get a ton of snow/ice build up with a 17" wheel since it won't take much accumilation to exceed the aspect ratio height. I used to have horrible issues with this when running a 16" snow tire. With the 14" I have on my 2011, it almost is never an issue. Pick a wheel with the smallest opening between the spokes as well.