IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

Tire width on stock rims/wheels

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Old Apr 9, 2014 | 10:08 PM
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Default Tire width on stock rims/wheels

guys,

based on the wheel specs, our rims are 8 inches wide (front) and 8.5 inches wide (rear)

If i were to convert them into mm,

It would be around:
front: 203.2 mm
rear: 215.05 mm

does that mean, theoretically, i can use 225/40/18 tire for both front and rear?

i cant seem to find the right info to understand this part.
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Old Apr 10, 2014 | 12:23 AM
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In theory, you can use a wide set of different tyre widths on rims.
Depending on how you want it to look, streched or balooned.

It is fully possible to use 225 in the rear, but you rims edges are more proned to get damaged if you skrape a curbe or something. Usually the edges of the tyres lip are made to protect the rims. But they only work if you have the correct width tyre to match the rim.
For 8,5" wide rims, 245 or 255 are usually recomended.
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Old Apr 10, 2014 | 02:20 AM
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can you upload some pictures of what do you mean by stretched or balooned?

thank you so much for your reply
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Old Apr 10, 2014 | 10:10 AM
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Just google it. Streched is the first pic.
Balooned is the secod pic.
This is about the limited on streched and balooned, and 225 on 8" wide rims will not look that streched at all. But the tire will not cover the outside on the rim, like it does with the 255 stock tyres.

Like this

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Old Apr 10, 2014 | 07:02 PM
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Originally Posted by magne
Just google it. Streched is the first pic.
Balooned is the secod pic.
This is about the limited on streched and balooned, and 225 on 8" wide rims will not look that streched at all. But the tire will not cover the outside on the rim, like it does with the 255 stock tyres.

Like this

Thanks!

i tried googling it but wasnt sure if what i am seeing is right or wrong.
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Old Apr 10, 2014 | 07:54 PM
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I'm using 235/40/18's on stock F-sport wheels for my winter setup. Tire Rack's website lists the RIM WIDTH RANGE and MEASURED RIM WIDTH for every specific tire. The latter is the recommended rim width for the tire.
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