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Old 12-13-2003, 11:33 PM   #1
duffy325
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Join Date: Sep 2003
Location: Kentville NS Canada
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Tire selection help

Greetings and Happy Holidays from Nova Scotia.

I tried searching but I haven't been able to find a final answer. How wide a tire can I put on a 7.0 inch wide wheel?

I currently have 225 45 zr17's, and I need to get two more in the spring. Should I go for wider in the rear? Can I go wider than this on this width of wheel?

Thanks for the assistance, and have a safe christmas.
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Old 12-14-2003, 05:59 PM   #2
duffy325
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Anyone know the scoop on this? Search function isnt working cause of the current technical issues.
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Old 12-16-2003, 05:19 PM   #3
duffy325
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bump
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Old 12-16-2003, 06:45 PM   #4
Mystikal
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225 is the max in most tire spec catalogs for a 7" rim. Even with that setup, you are missing a lot of sidewall strength that a 7.5 or 8" would have. I have read many testimonials about how much better the same tire feels after being put on a wider rim, and it was exactly the same situation. He had E46 non-SP wheels and mounted 225's, and they felt a little squirmy. He bought some OZ 17x8's, remounted the tires, and the car felt significantly better.

Do not go any wider.
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Old 12-16-2003, 07:33 PM   #5
duffy325
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Thanks for the advice Mystikal. Should i go slightly narrower for the fronts then? Or same size all around?

Also, can anyone recommend tire pressure? I know 32 is fairly standard, but for my 15's it recommends 28fr, 32Ba. I couldnt find any info on the 17's.
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Old 12-16-2003, 08:26 PM   #6
Mystikal
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Keep it the same all around. No 3-series needs a staggered setup, they don't have nearly enough power. Stick with the 225's.

As for tire pressures, play around with it a little. BMW has the guidelines like any manufacturer, but those are way too low for spirited driving. Try something moderate like 36-38 all around and feel the difference. Don't go above values like 44 or so however, you'll get uneven wear.
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Old 12-16-2003, 09:33 PM   #7
duffy325
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Awesome thanks. Ill keep this in mind when i put them back on in the spring. Sucks having my steels for the winter, but what do you do.
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