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Old 03-17-2008, 12:10 PM   #1
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Question Tire Question (Please Help)

Hi my name is Will and I am new to this forum. I have a question about the tires on my Focus. I have a 2005 Focus ST that has the 205/50/R16 my question is can I put a 205/55/R16 on it without it rubbing. My next question would be is it possible to put a 15" wheel on it. I am trying to get away from the stock tires because they are expensive and I comute. I understand that changing the tire size will cause my speedometer to be off. I just want to know if the next size up will rub or if the 15" wheel will fit. I wasn't sure if the breaking system was different for the ST than the other Focuses. I know a bigger brake rotor will not allow you to downsize wheels. Thanks in adavance for any help.


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Old 03-17-2008, 01:49 PM   #2
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check here for speedo differences, i'm not sure about the st brakes clearing 15" wheels, im pretty sure the rotors are bigger than regular focii
http://www.miata.net/garage/tirecalc.html
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Old 03-17-2008, 02:04 PM   #3
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15" wheels are the smallest you can fit. OEM definately will fit. Aftermarket should as well, but you have to double check on those, since its a really tight fit with OEM wheels.

With a stock suspension, you'll be fine with a 205/55-16. Like you said, your speed will be off.
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Old 03-17-2008, 03:40 PM   #4
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Quote:
Originally Posted by Sid03SVT View Post
check here for speedo differences, i'm not sure about the st brakes clearing 15" wheels, im pretty sure the rotors are bigger than regular focii
http://www.miata.net/garage/tirecalc.html
Thanks. I had a truck once I wanted to downsize the wheels but the rotors wouldn't let me. Checked out that site and the 205/50/R16 was almost the same as 195/60/R15. Checked my spare and it is on a 15" rim so I am pretty sure the 15" will work. Thanks again.
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Old 03-17-2008, 05:55 PM   #5
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If you are traveling a long ways at one time at a high speed say on a freeway wouldn't a larger diameter make sense as far as gas and distance traveled? In essence changing your final drive.
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Old 03-17-2008, 06:10 PM   #6
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I've got 205/55/16 on OEM wheels on my 04 wagon, which replaced the original 195/60/15s. No problem.
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Old 03-17-2008, 07:32 PM   #7
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jetrinka,

you are right a larger diameter wheel would equal less wear less rotations per miles traveled, However there is not much room for a much larger tire. I was just concerned with having a tire that would rub while turning.

Oregon-ized thanks for the response. I was really wanting to get that size tire, I just didn't want to buy a new set and have them rub. I am going to check locally for a set of tires on a 15" rim or I may just go with the 205/55R16 as you did.

Thanks to everyone for the help.
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Old 03-17-2008, 08:47 PM   #8
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yeah I just got tires and it was a bitch trying to find the 205/50R/16s had to order them and wait for three days.
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Old 03-18-2008, 05:57 PM   #9
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yeah I just got tires and it was a bitch trying to find the 205/50R/16s had to order them and wait for three days.
Yeah I feel your pain no one around here ever has them in stock, they are overpriced, and the tread life sucks. I would rather have a longer lasting tire, I hardly ever do any hard driving.
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Old 03-18-2008, 07:56 PM   #10
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Hi Sir with tire question, I used to have a 06 Zx4 With the bigger size brake rotors on the front like the svt has , stock 15s wouldnt fit on it I tried it. make sure you try them before buying them if you have the bigger calapers they wount work. I just put a set of215/45/17 on my focus they clear fine no problems.
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