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Old 09-10-2005, 06:24 PM   #51 (permalink)
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Default Re: A Focus-friendly tire diameter chart

i got a question. I was lookin through the roush catalog and the wheel and tire setup they sell says it comes with 17x7 wheels and 255/45/17 tires. doesn't make much sense to me. andyone else heard this and will it work, cause i don't think it will
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Old 09-10-2005, 08:09 PM   #52 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Quote:
i got a question. I was lookin through the roush catalog and the wheel and tire setup they sell says it comes with 17x7 wheels and 255/45/17 tires. doesn't make much sense to me. andyone else heard this and will it work, cause i don't think it will
I believe that you are correct.
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Old 10-12-2005, 01:16 PM   #53 (permalink)
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Default Re: A Focus-friendly tire diameter chart

I run 225/45/17 Azenis RT-615s on my SVTF. I had some slight rubbing on severe (pothole) compressions when they were new, but haven't had any issues since a few weeks of daily driving had occurred. Now they don't ever rub, on track or on severe compressions.

I also saw a post on sccaforums.com that one guy running an STS Focus got 245/40/17 Hoosiers to fit. He had aftermarket wheels to get the offset just right to make it work, but it did. That would be most welcome for next season...
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Old 10-23-2005, 06:58 PM   #54 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Quote:
what about 215-35-19
What he said!!!
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Old 10-23-2005, 07:29 PM   #55 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Quote:
I also saw a post on sccaforums.com that one guy running an STS Focus got 245/40/17 Hoosiers to fit. He had aftermarket wheels to get the offset just right to make it work, but it did. That would be most welcome for next season...
Hoosier doesn't make any tire that is STS legal. Also the maximum legal tire width in STS is 225.
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Old 10-24-2005, 03:24 PM   #56 (permalink)
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Default Re: A Focus-friendly tire diameter chart

What if I want to add 17" rims on my ride which originally has 16" wheels? Would I have to reset the ECU to compensate for the changed diameter or are there tires that can accomodate the 17" rims yet still remains the same size in diameter?
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Old 11-12-2005, 01:59 PM   #57 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Can any one help a newbi.
I have a ford focus flexifuel hgv from 2004.
One like this:
http://img212.imageshack.us/my.php?i...73810010yg.jpg

I bought the car with 195/60-15 wheels and have now been offered a pari of snow wheels for free with the dimentions 175/70-14. Does any one know if these would fit or not?
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Old 11-23-2005, 03:48 PM   #58 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Do the tire sizes listed , fit all focuses (SVT, ZTS)? will 14" fit on ZTS (winter tires)?

Thanks
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Old 11-23-2005, 03:54 PM   #59 (permalink)
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Default Re: A Focus-friendly tire diameter chart

14's will fit any 2000-2004 Focus except an SVT because of it's larger brakes.

All 2005 Focuses have larger brakes (but not as big as the SVT's 300mm's), so 14's may not fit on these.

Nobody's sure of the '05 ST as having 300mm brakes; I think they do.
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Old 11-23-2005, 04:46 PM   #60 (permalink)
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Default Re: A Focus-friendly tire diameter chart

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14's will fit any 2000-2004 Focus except an SVT because of it's larger brakes.

All 2005 Focuses have larger brakes (but not as big as the SVT's 300mm's), so 14's may not fit on these.

Nobody's sure of the '05 ST as having 300mm brakes; I think they do.

Thanks for the quick response.. ford dealer says no for 2002 ZTS, but I thought they were just playing it safe.
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Old 12-13-2005, 08:53 PM   #61 (permalink)
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Default Re: A Focus-friendly tire diameter chart

I have 235/40/17 on my SVT and have never heard them rub....
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Old 01-18-2006, 01:31 AM   #62 (permalink)
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Default Re: A Focus-friendly tire diameter chart

EDIT: Thanks to Z63R for pointing out that REV per MILE INFO IS INCORRECT. I am currently updating this table with the correct information. Sorry to anyone who I've inconvenienced. My original source was faulty.


In light of just having to adjust my speedo with my Xcal2 to read correctly with my new tire size, I thought I'd add a little value to this chart by adding the revolutions per mile for each tire size. I also noticed that most of the tire diameters were off by a tenth or so, and I corrected where appropriate.

Also, '05s do NOT have 300mm SVT front brake rotors. THey are a unique size inbetween the SVT & <'05 NON-SVT front rotors.

Tire Size ........ Diam. . Rev / mi
175 / 70 - 14 .. 23.7" .. 853
185 / 70 - 14 .. 24.2" .. 834
185 / 65 - 14 .. 23.5" .. 892- OE size
195 / 65 - 14 .. 24.0" ...892*
195 / 60 - 14 .. 23.2" .. 898-
205 / 60 - 14 .. 23.7" .. 852
215 / 60 - 14 .. 24.2" .. 835

195 / 60 - 15 .. 24.2" .. 859- OE size
205 / 55 - 15 .. 23.9" .. 835-
205 / 50 - 15 .. 23.1" .. 874
215 / 50 - 15 .. 23.5" .. 860
215 / 55 - 15 .. 24.3" .. 830
225 / 50 - 15 .. 23.9" .. 845

195 / 50 - 16 .. 23.7" .. 852*
205 / 45 - 16 .. 23.3" .. 895
205 / 50 - 16 .. 24.1" .. 863 OE size
205 / 55 - 16 .. 24.9" .. 836
215 / 45 - 16 .. 23.6" .. 854*

205 / 40 - 17 .. 23.5" .. 886
205 / 45 - 17 .. 24.3" .. 831*
215 / 40 - 17 .. 23.8" .. 874
215 / 45 - 17 .. 24.6" .. 846 OE size

215 / 35 - 18 .. 23.9" .. 866
215 / 40 - 18 .. 24.8" .. 840

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Last edited by Oreo; 01-25-2006 at 04:42 AM.
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Old 01-25-2006, 08:40 PM   #63 (permalink)
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Default Re: A Focus-friendly tire diameter chart

In the spirit of being helpful, I've busted out the calculator and my 10 key skillz to compute revs/mile.

If you're going off of anything other than straight math, feel free to edit or remove this info.

ASSumption: 5280 feet per mile. 12 inches per foot. 5280*12=63360
Circumference=Diameter*pi inches
63360/circumference = revs/mile

Tire Size ........ Diam. . Rev / mi
175 / 70 - 14 .. 23.7" .. 851
185 / 70 - 14 .. 24.2" .. 833
185 / 65 - 14 .. 23.5" .. 858- OE size
195 / 65 - 14 .. 24.0" ...840
195 / 60 - 14 .. 23.2" .. 869
205 / 60 - 14 .. 23.7" .. 851
215 / 60 - 14 .. 24.2" .. 833

195 / 60 - 15 .. 24.2" .. 833- OE size
205 / 55 - 15 .. 23.9" .. 844
205 / 50 - 15 .. 23.1" .. 873
215 / 50 - 15 .. 23.5" .. 858
215 / 55 - 15 .. 24.3" .. 830
225 / 50 - 15 .. 23.9" .. 844

195 / 50 - 16 .. 23.7" .. 851
205 / 45 - 16 .. 23.3" .. 866
205 / 50 - 16 .. 24.1" .. 837 OE size
205 / 55 - 16 .. 24.9" .. 810
215 / 45 - 16 .. 23.6" .. 855

205 / 40 - 17 .. 23.5" .. 858
205 / 45 - 17 .. 24.3" .. 830
215 / 40 - 17 .. 23.8" .. 847
215 / 45 - 17 .. 24.6" .. 820 OE size

215 / 35 - 18 .. 23.9" .. 844
215 / 40 - 18 .. 24.8" .. 813


Quote:
Originally Posted by Oreo
EDIT: Thanks to Z63R for pointing out that REV per MILE INFO IS INCORRECT. I am currently updating this table with the correct information. Sorry to anyone who I've inconvenienced. My original source was faulty.


In light of just having to adjust my speedo with my Xcal2 to read correctly with my new tire size, I thought I'd add a little value to this chart by adding the revolutions per mile for each tire size. I also noticed that most of the tire diameters were off by a tenth or so, and I corrected where appropriate.
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Old 01-25-2006, 08:54 PM   #64 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Quote:
EDIT: Thanks to Z63R for pointing out that REV per MILE INFO IS INCORRECT.
LOL; well, I didn't exactly say it was incorrect. I pointed out, in a PM to Oreo, what Hankook's website had posted for revs per mile and it was quite a bit different.

Now our friend gobstopper has posted yet different figures.


I quote Hankook's figures for the sizes posted for the Focus (in the original [FJ]stickied post) in 16 and 17 inch diameters:

Quote:

205/50ZR16 87W Z212 24.1 862

205/55ZR16 91W Z212 24.9 835

215/45ZR16 86W Z212 23.6 879


215/ 40ZR17 87Y Z212 23.8 874

215/ 45ZR17 91Y Z212 24.6 843
I'm going to go with this tire manufacturer's figures for now, until we resolve this issue.

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Old 01-25-2006, 11:39 PM   #65 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Well, I believe Gobstopper's numbers are being calculated the same way my ORIGINAL information was calculated because those numbers look to be about the same. *Note that at the time of THIS posting, I've edited about half of the numbers in my previous post, so they won't match Gobstopper's.

For my corrected info, I have been getting my numbers from TireRack's tire spec's for various tires. All of those numbers (across different brands) seem to be consistent to within a few revs of each other for any given tire size. While I trust math to give an accurate number for an unloaded, non-spinning tire... I'm more willing to trust the manufacturer's specs to correctly reflect real-world performance.
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Old 01-26-2006, 12:58 AM   #66 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Quote:
Originally Posted by Oreo
For my corrected info, I have been getting my numbers from TireRack's tire spec's for various tires. All of those numbers (across different brands) seem to be consistent to within a few revs of each other for any given tire size. While I trust math to give an accurate number for an unloaded, non-spinning tire... I'm more willing to trust the manufacturer's specs to correctly reflect real-world performance.

Well said, Sir.

And I am by no means casting any aspersion towards gobstopper's incredible mathematical skilZ.
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Old 01-27-2006, 03:15 PM   #67 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Quote:
Originally Posted by Z63R
Well said, Sir.

And I am by no means casting any aspersion towards gobstopper's incredible mathematical skilZ.
I would also trust the manufacturers' specs, hence my disclaimer.

And I wouldn't call it mathematical skillZ as much as I'd call it remembering 7th grade geometry.

Now, my 10-key, on the other hand...

That's skillZ.

Quote:
While I trust math to give an accurate number for an unloaded, non-spinning tire...
What's the airspeed velocity of an unladen swallow?
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Old 02-27-2006, 01:54 PM   #68 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Falken makes an Azenis RT-615 that is 205/40r16. This would make it one of the smallest overall diameters in the list, but it has not been added. Can someone please add it?
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Old 03-04-2006, 10:52 AM   #69 (permalink)
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Default Re: A Focus-friendly tire diameter chart

i have 225/50-15 on my car...they work great and look wide too..i have no problem turning or anything...
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Old 03-06-2006, 10:31 AM   #70 (permalink)
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Default Re: A Focus-friendly tire diameter chart

What brand/model are they?
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Old 03-11-2006, 03:38 AM   #71 (permalink)
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Default Re: A Focus-friendly tire diameter chart

does anybody know what size tire to run on a 19" rim?
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Old 03-13-2006, 08:48 AM   #72 (permalink)
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Quote:
Originally Posted by Zx3vteckiller
does anybody know what size tire to run on a 19" rim?
Are they 19x7?
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Old 03-17-2006, 08:24 PM   #73 (permalink)
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Default Re: A Focus-friendly tire diameter chart

Thanks to everyone for the handy RPM/tire size guide.

For anyone dialing in their speedo to new tires via reprogramming, the most accurate way of knowing the circumference of YOUR tires at the pressure YOU run so that you can use the supplied formula is to mark the sidewall and make a mark on the ground at the mark. Now, drive the car forward until the mark comes around again, and mark the ground. The distance between the marks is the TRUE rolling circumference. If you do it ten revolutions and divide the result by ten, it should be even more accurate. Tread thickness, the 'squirminess' of the rubber, the pressure you run, etc, can all affect the rolling circumference.

On an unrelated note, I've found out that 205/40-17's just can't seem to survive Chicago potholes. I've dented two rims and seem to have broken a cord/belt internally in one of my Ecsta ASX's, so I'm moving up to 215/45's. I really wanted 225/45's, as I like how they look on WRX's, but it seems they probably would rub from what I've read on here.

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Old 03-17-2006, 11:17 PM   #74 (permalink)
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Default Re: A Focus-friendly tire diameter chart

What about 19's?

Are you guys not even gonna think about including them?
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Old 08-01-2006, 11:53 PM   #75 (permalink)
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Default Re: A Focus-friendly tire diameter chart

ok kinda crazy here, but how about a 215/40r16?
or a 225/40r16
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