Wheel setup

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Apr 27, 2017 | 09:43 AM

SmokinJGJ

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From: Québec

Wheel setup

Hello there,

I just bought a 3rd gen IS F sport and decided to go for 19" Niche Targa wheels. My setup is:
19"x8.5 et35 in front (225/35/19) Michelin, super sport.
19"x9.5 et35 in back (255/30/19) Michelin, super sport.

No issues with front setup. I get little rubbing in the back with good bumps. Dealer talks about fender roller but there is no Inside lip to be rolled ! Fenders are just straight from top to bottom.
It's annoying and want to get rid of that.

What are my options without changing car specs?

Any thoughts?

Thanks !

Last edited by SmokinJGJ; Apr 27, 2017 at 10:26 AM.

Apr 27, 2017 | 10:20 AM

Sasnuke

Lexus Test Driver

Joined: Feb 2017

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From: Richmond Hill, Ontario, Canada

I don't have personal experience with this, but I've read on the forum that others have had to get the rear fenders "stretched" in order to correct rubbing.
You may want to check with a body shop.

Apr 27, 2017 | 11:36 AM

nathantse

Lexus Test Driver

Joined: Dec 2015

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From: California

I'm no expert when it comes to wheels. But is your car lowered?

255 rear doesn't seen as big, my cousins 2011 IS250 has 19s with 275 rear, and he doesn't rub. But, he has on stock suspension.

Apr 27, 2017 | 01:48 PM

SmokinJGJ

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From: Québec

Thanks for your answer !

No, my car is not not lowered and i'm still on stock suspension too. 255 is the same as stock tire witch is 255/35/18.

With all the setup I have seen on this forum, I have absolutely no clue why I get some rubbing on this setup !

Apr 27, 2017 | 04:34 PM

Sasnuke

Lexus Test Driver

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From: Richmond Hill, Ontario, Canada

Quote:

Originally Posted by SmokinJGJ

I would suspect the +35 offset of the rear rims is the issue. Typically folks get +38 or higher.
Although I'm surprised you are rubbing with stock suspension.

Apr 27, 2017 | 04:57 PM

SmokinJGJ

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From: Québec

That's what I notice de most from other picture and setup. The majority were using +38 and +40. That would make sense.....and this only for 3mm.

Thank you.

Apr 27, 2017 | 07:38 PM

corradoMR2

The pursuit of F

Joined: Jul 2006

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From: Toronto, Canada

Quote:

Originally Posted by SmokinJGJ

That's what I notice de most from other picture and setup. The majority were using +38 and +40. That would make sense.....and this only for 3mm.

Thank you.

Tire sidewall shape and sectional width play a big factor and these depend on the specific tire brand/model. On a +38 rear, mine rubs a little on big dips/bumps with 265/30/19 tires that have a squared sidewall and section width of 10.6". If I had rounder sidewalls or narrower width, no rubbing.

For you, I doubt your 255 tires are wider than 10.2" which means they would not be the contributor to the rubbing. I would therefore look at the alignment. My rear had positive toe and rubbed more before the alignment to 0. Get this checked out. Good luck.