Tire size for 18X7 wheel - Mazda3 Forums : The #1 Mazda 3 Forum
 
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post #1 of 7 (permalink) Old 07-30-2011, 08:26 PM Thread Starter
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Tire size for 18X7 wheel

I have a Mazdaspeed 3 that I autocross. The stock wheel size (which I need to keep to stay in the stock class) is 18'' X 7''. The stock tire size is 215-45-R18. I would like to get something a little bit wider. I will be staying with street tires (something like a Potenza RE-11 or similar). What sizes are reasonable (not too much pinching, and can be mounted by normal shops)? 225-45-R18? 235-40-R18? Something else? Any advice on what would work well is appreciated.
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post #2 of 7 (permalink) Old 07-31-2011, 02:40 AM
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Re: Tire size for 18X7 wheel

You can run a Hoosier 245/35/18. The Kumho V710 in the same size probably be almost impossible to mount...


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post #3 of 7 (permalink) Old 07-31-2011, 09:09 PM Thread Starter
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Re: Tire size for 18X7 wheel

[quote author=justint5387 link=topic=194307.msg4083387#msg4083387 date=1312094439]
You can run a Hoosier 245/35/18. The Kumho V710 in the same size probably be almost impossible to mount...
[/quote]

What sizes would be reasonable to mount for street tires? I'm not looking to move to race slicks.
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post #4 of 7 (permalink) Old 07-31-2011, 09:51 PM
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Re: Tire size for 18X7 wheel

I would run 225/45, it'll help your gearing.


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post #5 of 7 (permalink) Old 08-03-2011, 12:36 PM
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Re: Tire size for 18X7 wheel

I would run the 245/40/18 Kumho V710. We have no trouble getting them mounted on an 18x7 (even at the local discount tire), and the gearing is way better for the older speed 3's. Don't let the squared shoulder V710's scare you, they wear about the same as the round shoulder 245/35/18.
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post #6 of 7 (permalink) Old 08-03-2011, 02:04 PM
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Re: Tire size for 18X7 wheel

I ran 235/40R18 Potenza RE01r tires before I switched to R-comps. The 235s were not the easiest to mount, but any decent tire shop should be able to handle it. I actually still have a set of 235/40R18s RE01r tires mounted as my rain tires.

I would bo with the Hankook Ventus RS-3, or if you want to spend a bit mor the Potenza RE11. I have heard decent reviews of the RS-3s, and they are reasonably priced.

Andrew
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post #7 of 7 (permalink) Old 12-21-2011, 07:42 PM
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Re: Tire size for 18X7 wheel

[quote author=justint5387 link=topic=194307.msg4083387#msg4083387 date=1312094439]
You can run a Hoosier 245/35/18. The Kumho V710 in the same size probably be almost impossible to mount...
[/quote]

I have 18x7 wheels mounted with 245/35/18 V710's. Very difficult, but not impossible.
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