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I'm in the mood for sharing info today, so here are the options you have for tire sizes when going with larger wheels. The percentage next to the size is the difference in overall diameter compared to factory spec 185/60-14. It's useful as a quick reference if you're looking for a slight change in gearing, or if you want to see the compromise of running a wider tire. This is also an effective speedometer error ratio; a positive percentage means the speedo is reading lower than your actual speed, and a negative percentage means the speedo is reading high.

14" wheels:
195/55-14 -1.30%
195/60-14 +2.08%
205/55-14 +0.61%

15" wheels:
195/45-15 -3.65%
195/50-15 -0.28%
195/55-15 +3.10%
205/50-15 +1.45%
205/55-15 +5.00%
215/50-15 +3.19%
225/45-15 +1.02%

16" wheels:
205/40-16 -1.25%
205/45-16 +2.30%
215/40-16 +0.14%

17" wheels:
205/40-17 +3.15%
215/35-17 +0.81%
225/35-17 +2.03%

18" wheels:
215/35-18 +5.21%

I'm not promising these will all fit without problems, but these are the sizes that are closest to the original diameter of stock wheels and tires. Use this guide as a reference only and at your own risk.

If you have a tire size I didn't include, let me know and I'll add it to the list.
 

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I don't know the method that Tirerack uses, but the 185/16-14 Bridgestone PP and the Hoosier A6/R6 measured at 22.8" OD on their website.

Also, Hankook makes the Ventus Z212 in 225/45-15 (max performance summer tire), but good luck finding them in stock. :) The AutoXers have snatched them up already.
 

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Just a reminder: Those sizes are theoretical. Often, the actual diameter (and sometimes the actual width!) of a tire will be somewhat different from the calculated number.

That's why it is still important to look at the rotations/mile figure, or the actual diameter, that many tire manufacturers provide.

Still, those calculated numbers are much better than guessing, which is what I'd be doing without them! :)

--DD
 

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have you ever actually seen someone run those 215 or 225 tires of 17-18" wheels? with a 35mm offset i wouldn't think they'd fit without some serious rubbing issues.
maybe on a widebody???
 

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jmart said:
have you ever actually seen someone run those 215 or 225 tires of 17-18" wheels? with a 35mm offset i wouldn't think they'd fit without some serious rubbing issues.
maybe on a widebody???
If you ran a wheel larger than 15", it looks like there is enough clearance to bring the wheel in. I have a 15x7 wheel at +37 offset. If I had a 16" wheel, I could easily get a 8" wheel under the fender. Just have to find an offset that will keep the outside clearance the same and take advantage of the inner clearance on the knuckle. Might loose a little turning radius, though, as the wheel would probably touch the bulkhead at lock.
 

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good thread.

I ran 195/45-15 on my 91 crx. I would like to put a 205/50-15 on my new crx. Anyone run this setup? Or would you recommend sticking with the 195's for DD?
 

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thanks jfro. Do you have any opinions on nitto 555r's. Any other budget tires that you would recommend?
 

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Yea, stock as of right now. I do plan on a B series swap though.
 

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thing is those number are USELESS since now two tires in the same sixe from different product lines or maker are those exact specs.

Our Hondas are setup for a 23.2" tire, 185/65/14 for example CURED my odometer and most opf the speedometer error.

0.5 mile error in odometer in 150 miles traveled, but speedo still reads 3 mph high from 30-75 mph.

GPS and Mile Marker verifed.

Did I mention I got bored on a few trips to Detroit and back??????
 

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jfrolang said:
I'm not promising they'll fit without problems, but these are the sizes that are closest to the original diameter of stock wheels and tires. Use this guide as a reference only and at your own risk.

I think I'm gonna add that little disclaimer to the bottom.
205-50-15 Yokohama S.Drive
15x7" Rota Slipstream

With stock allignment they stick out a bit, and will possibly rub, this is on a lowered car. I haven't hit the bumpstops, so it hasn't rubbed. I'll get full measurements later.
 
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