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

Tire diameter increase

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Old Jul 8, 2014 | 08:19 PM
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Default Tire diameter increase

Guys,

I am thinking of increasing my car tire size from 225/40/18 to 225/45/18

and the rears from 255/35/18 to 255/40/18

do you think there would be rubbing issues?


Thanks!
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Old Jul 8, 2014 | 09:45 PM
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I only recommend the following size that I know wont rub

225/40/18
255/35/18
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Old Jul 8, 2014 | 10:57 PM
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Originally Posted by Need4Speed
I only recommend the following size that I know wont rub

225/40/18
255/35/18
How about 19" configs?
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Old Jul 8, 2014 | 11:13 PM
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Originally Posted by Need4Speed
I only recommend the following size that I know wont rub

225/40/18
255/35/18

but this is already the stock tire sizes
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Old Jul 9, 2014 | 12:07 AM
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There won't be a rubbing issue.
However your odometer and speedometer will be wrong
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Old Jul 9, 2014 | 12:10 AM
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Originally Posted by specONE
but this is already the stock tire sizes
He meant don't mess with the size.
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Old Jul 9, 2014 | 04:49 AM
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Originally Posted by specONE
but this is already the stock tire sizes
I know, right?

What are the 19" sizes peopl are using?
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Old Jul 9, 2014 | 05:44 AM
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or you could go 10mm wider around for more grip. I went with 235/40/18 and 265/35/18. PSS are a lot more square than stock tire sizes so it was bigger than I expected but no rubbing
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Old Jul 9, 2014 | 06:40 AM
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Originally Posted by 4TehNguyen
or you could go 10mm wider around for more grip. I went with 235/40/18 and 265/35/18. PSS are a lot more square than stock tire sizes so it was bigger than I expected but no rubbing
May go down this route thanks
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Old Jul 9, 2014 | 06:49 AM
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Hi.
Glad I found this thread.
I'd like to change from 18" to 17" wheels. Does anybody know if 245/45/17 tires will fit with no issues ?

Thanks a lot.
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Old Jul 9, 2014 | 07:09 AM
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stock ER33 are thin even though my pilot super sports are 10mm wider with the same aspect ratio, the sidewall is a lot thicker

https://www.clublexus.com/forums/8586063-post53.html
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Old Jul 9, 2014 | 12:55 PM
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Originally Posted by 4TehNguyen
or you could go 10mm wider around for more grip. I went with 235/40/18 and 265/35/18. PSS are a lot more square than stock tire sizes so it was bigger than I expected but no rubbing
4TehNguyyen, do you have those mounted on the stock rims? Reason I ask is because 265/35/18 PSSs are recommended for rim widths 9 to 10.5 inches - stock 18 rims in the back are 8.5 inches wide. If on stock rims, any issues with rim width? Any issues with installers? I've heard of people trying to install non-recommended tire sizes having to sign away any right to recourse due to non-recommended fitment. Thanks for any info. PatrixUSA
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Old Jul 9, 2014 | 03:36 PM
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yes they are the stock wheels. They put it on just like any other tire, no issues
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Old Jul 9, 2014 | 06:25 PM
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Originally Posted by 4TehNguyen
stock ER33 are thin even though my pilot super sports are 10mm wider with the same aspect ratio, the sidewall is a lot thicker

https://www.clublexus.com/forums/8586063-post53.html
i calculated that you added around 3-4mm of diameter but it looks much more than that!

Maybe the width contributed to additional height?
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Old Jul 9, 2014 | 07:20 PM
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not all tires are sized the exact way its calculated, you can get two 225/40/18 and they would be different sized. Stocks seem to be on the small side. Some tires are more square on the sidewall than others.
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