A Focus-friendly tire diameter chart - Page 3 - The Ford Focus Forum

**kipp** · 09-10-2005, 06:24 PM

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

**Nliiitend1** · 09-10-2005, 08:09 PM

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.

**Carrera26** · 10-12-2005, 01:16 PM

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...

**KA1** · 10-23-2005, 06:58 PM

Quote:

what about 215-35-19

What he said!!!

**CharlesWA** · 10-23-2005, 07:29 PM

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.

**ElCapo985** · 10-24-2005, 03:24 PM

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?

**jebo** · 11-12-2005, 01:59 PM

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?

**fos17** · 11-23-2005, 03:48 PM

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

Thanks

**Z63R** · 11-23-2005, 03:54 PM

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.

**fos17** · 11-23-2005, 04:46 PM

Quote:

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.

**comporange03** · 12-13-2005, 08:53 PM

I have 235/40/17 on my SVT and have never heard them rub....

**Oreo** · 01-18-2006, 01:31 AM

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

**gobstopper** · 01-25-2006, 08:40 PM

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.

**Z63R** · 01-25-2006, 08:54 PM

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.

**Oreo** · 01-25-2006, 11:39 PM

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.

**Z63R** · 01-26-2006, 12:58 AM

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.

**gobstopper** · 01-27-2006, 03:15 PM

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?

**John B** · 02-27-2006, 01:54 PM

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?

**yellowfocus02** · 03-04-2006, 10:52 AM

i have 225/50-15 on my car...they work great and look wide too..i have no problem turning or anything...

**John B** · 03-06-2006, 10:31 AM

What brand/model are they?

**Zx3vteckiller** · 03-11-2006, 03:38 AM

does anybody know what size tire to run on a 19" rim?

**John B** · 03-13-2006, 08:48 AM

Quote:

Originally Posted by Zx3vteckiller

does anybody know what size tire to run on a 19" rim?

Are they 19x7?

**Inkedfireman** · 03-17-2006, 08:24 PM

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.

Denny in Aurora IL

**zoom** · 03-17-2006, 11:17 PM

What about 19's?

Are you guys not even gonna think about including them?

**ladybug04** · 08-01-2006, 11:53 PM

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

09-10-2005, 06:24 PM	#51 (permalink)
kipp Senior TEAM Member Join Date: Feb 2004 Location: KCK Posts: 1,535	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

10-12-2005, 01:16 PM	#53 (permalink)
Carrera26 Rookie Join Date: Oct 2005 Posts: 38	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...

10-24-2005, 03:24 PM	#56 (permalink)
ElCapo985 Rookie Join Date: Sep 2005 Posts: 30	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?

11-12-2005, 01:59 PM	#57 (permalink)
jebo Newbie Join Date: Nov 2005 Posts: 1	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?

11-23-2005, 03:48 PM	#58 (permalink)
fos17 Newbie Join Date: Nov 2005 Posts: 2	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

11-23-2005, 03:54 PM	#59 (permalink)
Z63R Official [FJ] Distinguished Advisor Join Date: May 2004 Location: El Lay Ca Posts: 22,829	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.

12-13-2005, 08:53 PM	#61 (permalink)
comporange03 TEAM Member Join Date: Nov 2004 Posts: 107	Re: A Focus-friendly tire diameter chart I have 235/40/17 on my SVT and have never heard them rub.... __________________ 2003 Competition Orange #844 Steeda Springs, Eibach Swaybars, Steeda Camber Adj, Short Shifter, Cervinis Mid Wing, Body Pops and Clicks, Crappy Factory Stereo

01-18-2006, 01:31 AM	#62 (permalink)
Oreo DoubleStuf™ Join Date: Jan 2005 Location: GlockPost.com Posts: 4,049	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 __________________ I'M BACK FROM THE DEAD!!........................................... Getting installed right friggin now as fast as I can crack the whip at the builder's ass:T2 ATB, 4.06 fdr, Cosworth IM, Stg 2 Crane cams, Eagle ConRods, 12.5:1cr 88mm Supertech pistons, Fidanza FW, Luk ProGold clutch, CFM Adj. cam gears Installed: SVT Brakes, ST200 Rims, Koni Sports, -2" Apex springs, poly FLCA & dog-bone bushings, Progress 22mm RSB, TriAx/F STS, Cosworth CAI, Draxas & Trubendz exhaust, XCal2- Now with more ProRacer! Last edited by Oreo; 01-25-2006 at 04:42 AM.

01-25-2006, 11:39 PM	#65 (permalink)
Oreo DoubleStuf™ Join Date: Jan 2005 Location: GlockPost.com Posts: 4,049	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. __________________ I'M BACK FROM THE DEAD!!........................................... Getting installed right friggin now as fast as I can crack the whip at the builder's ass:T2 ATB, 4.06 fdr, Cosworth IM, Stg 2 Crane cams, Eagle ConRods, 12.5:1cr 88mm Supertech pistons, Fidanza FW, Luk ProGold clutch, CFM Adj. cam gears Installed:* SVT Brakes, ST200 Rims, Koni Sports, -2" Apex springs, poly FLCA & dog-bone bushings, Progress 22mm RSB, TriAx/F STS, Cosworth CAI, Draxas & Trubendz exhaust, XCal2- Now with more ProRacer!

02-27-2006, 01:54 PM	#68 (permalink)
John B RapMaster ConeBlaster Join Date: Aug 2000 Location: Sumter, SC, USA Posts: 2,116	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? __________________ Clickies: MySpace / CarDomain / SCR-SCCA / ProFlaggers 2005-2008 SCR-SCCA STS Champion National F&C Parting out my car. Jetters get first crack. Inquire within.

03-04-2006, 10:52 AM	#69 (permalink)
yellowfocus02 Rookie Join Date: Oct 2004 Location: raleigh north carolina Posts: 10	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... __________________ got some mods. im gettin there

03-06-2006, 10:31 AM	#70 (permalink)
John B RapMaster ConeBlaster Join Date: Aug 2000 Location: Sumter, SC, USA Posts: 2,116	Re: A Focus-friendly tire diameter chart What brand/model are they? __________________ Clickies: MySpace / CarDomain / SCR-SCCA / ProFlaggers 2005-2008 SCR-SCCA STS Champion National F&C Parting out my car. Jetters get first crack. Inquire within.

03-11-2006, 03:38 AM	#71 (permalink)
Zx3vteckiller TEAM Member Join Date: Feb 2004 Location: Graham, Wa Posts: 138	Re: A Focus-friendly tire diameter chart does anybody know what size tire to run on a 19" rim? __________________ Your honda looks better in my rearview

03-17-2006, 08:24 PM	#73 (permalink)
Inkedfireman TEAM Member Join Date: Dec 2005 Location: Northbrook, IL Posts: 335	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. Denny in Aurora IL

03-17-2006, 11:17 PM	#74 (permalink)
zoom TEAM Member Join Date: Sep 2004 Posts: 322	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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