IS F (2008-2014) Discussion topics related to the IS F model

? about tire size

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Old 06-14-16, 12:57 AM
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toyer14
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Default ? about tire size

Will i have any issues with 275 40 r19 tires in the rear,getting a good deal on that size,08 stock rims.
Old 06-14-16, 01:33 AM
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bnizzle87
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There won't be any issues in terms of fitment and having adequate room in the rear wheel well. The problem is that the size is way too big for the rear in terms of sidewall. Compared to stock tire sizes, the diameter will be 1.6 in. greater, sidewall height will increase by 0.8 in., and where you'll see the greatest detractor to this particular size is the revolutions per mile, with a decrease of 40 compared to stock. What this means is that you'll be going 56 MPH when your speedometer reads 60 MPH.

A more appropriate size that many have gone with is 275/35. While you may be getting a good deal, it just isn't the proper upsize for this car.
Old 06-14-16, 08:43 AM
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newgsman
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I think the speedometer will be reading too low. When your speedometer is showing 60mph you will actually be going about 64mph.
Old 06-14-16, 01:46 PM
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jspecvtec
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Originally Posted by toyer14
Will i have any issues with 275 40 r19 tires in the rear,getting a good deal on that size,08 stock rims.
Too tall. Go with a 35 or 30
Old 06-14-16, 02:02 PM
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lolfunxion
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275/30

There's a dozen or more threads on this already
Old 06-14-16, 02:48 PM
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ISFwpg
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I just got 275/35 and think it was a better choice than the 30. I'd rather be 2 percent larger diameter than 2 lower which were the choices. It fills out all the remaining space though, without fender work 40 might rub.
Old 06-14-16, 09:49 PM
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jspecvtec
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Originally Posted by ISFwpg
I just got 275/35 and think it was a better choice than the 30. I'd rather be 2 percent larger diameter than 2 lower which were the choices. It fills out all the remaining space though, without fender work 40 might rub.
I'd go 35 for the extra rubber for crappy roads too. 40 is way too tall
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