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

Tire size 2013 ISF

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Old 03-22-23, 03:22 PM
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silverevo
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Default Tire size 2013 ISF

Could I get away with running 235/40 in the front? Or stick with 225/40? Running 275/35 in the rear. Stock BBS wheels, stock suspension. Thanks for any info in advance!

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Old 03-22-23, 05:45 PM
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lobuxracer
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You'd be better off with a 255/35 in front. That's what I run on your wheels, same in the rear 275/35.
Old 03-22-23, 06:06 PM
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silverevo
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Originally Posted by lobuxracer
You'd be better off with a 255/35 in front. That's what I run on your wheels, same in the rear 275/35.
I would but we have some nasty roads here where I live so the fronts get beat on a bit so I want to stick with 40 vs 35 in front.
Old 03-22-23, 08:05 PM
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A 255/35 has the same sidewall height as the OEM 225/40. They're the same rolling diameter.
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Old 03-23-23, 04:15 AM
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Alpine222
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How would downsizing to 18s work? Specifically 18x9.5 +45. I want to run 275/35s all around so I'm assuming with the smaller size it should fit. On stock suspension of course
Old 03-23-23, 06:48 AM
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silverevo
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Would 255/35 fit stock suspension without rubbing?
Old 03-24-23, 01:18 PM
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Originally Posted by silverevo
Would 255/35 fit stock suspension without rubbing?
I have 255/35/19 Michelin PS4S on the front of my car with the late model wheels. Doesn't rub at all.
Old 03-24-23, 01:25 PM
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silverevo
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What about your suspension, is it stock?
Old 03-24-23, 01:54 PM
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Originally Posted by silverevo
What about your suspension, is it stock?
Yes, except for the solid bushings in the LCA.
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