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Old 07-20-2006, 12:00 PM   #1
njskatchmo
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Default Tire Size vs. Wheel Width

I searched and couldn't find a final answer.

I'm considering aftermarket rims. What effect will going wiht 7" wide rims ofver 7.5" wide rims have. Theoretically if i understand correctly i should be able to fit wider tires on wider rims but I understand its also limited by the fenders. So my question is. If I plan on lowering (probably prodrive springs) what will be my tire size options with 7" and what will be my tire size options with 7.5"
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Old 07-20-2006, 12:14 PM   #2
Jon Bogert
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Assuming 17" wheels, 215/45-17 on 7" and 225/45-17 on 7.5" are the typical sizes. If you have a sedan, no reason not to go with the 225s on 7.5.
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Old 07-20-2006, 12:16 PM   #3
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will the difference between 215 and 225 be noticeable? Im thinking about getting uk 17's to maintain the sotck look.
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Old 07-20-2006, 02:10 PM   #4
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I've talked to people who claimed they can notice a difference...but given the variance in tire size from mfr. to mfr, I'd doubt it.

FYI...on a WRX sedan you can run 17x8 and 235/40 w/o rubbing.

And in competition, you WILL notice a difference between a 215 and a 235.
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Old 07-20-2006, 02:37 PM   #5
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No reason you can't run 225s on a 7" wheel. I'd still recommend getting an 8" wheel though. Leaves more options open for the future.
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Old 07-20-2006, 05:20 PM   #6
njskatchmo
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what options are there past 235 wont they all rub if they are larger?
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Old 07-20-2006, 06:43 PM   #7
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You can fit 255s with minor fender rolling.
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Old 07-21-2006, 09:26 AM   #8
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I had 245/40/17 on 17x8 +48 wheels with no rubbing on my WRX. No rolling required either.
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Old 07-21-2006, 12:04 PM   #9
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Quote:
Originally Posted by subber
I had 245/40/17 on 17x8 +48 wheels with no rubbing on my WRX. No rolling required either.
Yep. Most people have that experience.

But there are some cases where rubbing happens. A little rolling and/or spacers fixes it.
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Old 07-21-2006, 12:29 PM   #10
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Quote:
Originally Posted by waktasz
No reason you can't run 225s on a 7" wheel. I'd still recommend getting an 8" wheel though. Leaves more options open for the future.

Keeping in mind the rules of whatever racing you might be participating in...
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Old 07-21-2006, 02:54 PM   #11
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Quote:
Originally Posted by subber
I had 245/40/17 on 17x8 +48 wheels with no rubbing on my WRX. No rolling required either.

Are you lowered? I could probably justtttt clear, but I'll roll my fenders anyway.
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Old 07-30-2006, 08:38 PM   #12
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^^^ Yes I was lowered with Eibach springs at the time I was running that tire size.
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Old 07-31-2006, 07:44 PM   #13
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Why overgear? I stuck with 215/45/17's on my 7.5" rota's so I would be slightly undergeared which = slightly better acceleration which = a bigger grin on my face. I can still hit almost 70mph in 2nd gear anyways...
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Old 07-31-2006, 08:26 PM   #14
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235/40 is shorter and wider than 215/45.
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Old 07-31-2006, 09:36 PM   #15
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Quote:
Originally Posted by waktasz
235/40 is shorter and wider than 215/45.
235/40's aren't recommended for 7.5" wheels, you need at least 8" wide wheels and most 235/40's are measured on 8.5" wheels.
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Old 07-31-2006, 09:54 PM   #16
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what ev.
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