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

18" wheel/tire fitment

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Old 04-05-12, 07:43 AM
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rhy
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Default 18" wheel/tire fitment

Wondering if anyone's tried these sizes on all 4 corners with stock suspension. Any rubbing?

This would be a non-staggered HPDE/track setup, using Enkei PF01 18 x 9.5 +45. Not interested in slicks, but the best street tire available, will be driving to and from events on them and will focus on driver skill rather than setting any records.

Here are the sizes and what seems to be available from each:

275/35/18 (Star Spec, RS-3... both around $1.1k)
285/30/18 (AD08, almost $1.6k)
295/30/18 (AD08, $1.5k)

These are all symmetrical tires so they can be flipped on the wheels in order to get double life from them.
Old 04-06-12, 11:14 PM
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lobuxracer
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We know a Hoosier R6 in 285/30/18 fits without rubbing on the PF01s in a +45 offset. Ideal sizing to replace stock is 285/35/18, but no one here has posted about running this size so saying it will or won't fit without modifying the fenders is as good a guess as anything else. Selection in that size is also limited and expensive compared to the 30 series tires.

There's a pretty good selection in 285/30/18 for both street and DOT legal competition tires. If you really want to save, find a place selling used race tires. You can often get a set of take-offs for the price of a single new tire, and since you're not racing, it won't matter if they have some scrub on them or they get a little loose compared to fresh rubber because even a little loose they're way better than most - just keep in mind you could go faster with full fresh sticker tires.
Old 04-09-12, 09:11 AM
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Thanks for the tips! I believe there are a few race shops in the area, so buying their race take-offs sounds like a good idea.

I will probably stick with the proven 285/30/18 size. If I get a chance to try a different size, I will make sure to post back regarding fitment.
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