Hello,

I've seen lots of people with their 3rd Generation IS 300 F-Sport AWD's running 19x9.5 +35 rims and 255/30R19 tires in the rear while being lowered some whether (lowering springs, coil-overs, etc.) I was wondering how these guys are able to achieve it. I have a buddy of mine that is running this set-up with SPC adjustable upper control arms and lowered on BC Racing Coilovers and it seems like with 3-4 degrees of negative camber he can make it work but the adjustment in toe makes it so that he either shreds his tires in a matter of days or rubs the hell out of his quarter panel. I know an easy fix would be to raise the car to prevent it from rubbing in the first place, but I was wondering if there would be any way to have this set up and still be low and not rub.

Best Regards!

 

Welcome to the forum!

19x9.5 +35 is sorta hit and miss for rubbing in the rear...some do, some don't.
Depends on vehicle height and brand/size of tire.
If you go to a +38 you'll usually always be ok.

For your buddy's car there's a few unknowns that would make it tough to answer your question.
How low is the car? I can only imagine it's slammed if he's having these issues.
What tire brand is he using?
Why is he adjusting the Toe that much, or at all? I'm trying to imagine why adjusting the Toe would help the wheel clear, unless maybe it's rubbing right where the quarter and bumper meet.

 

Hello, thank you for the reply!

The car is lowered to the point where there is essentially no wheel gap at all but not yet slammed. He is running Falken tires and yes, you are spot on with the toe thing. He had to get toe out in order to make the bumper quarter area not rub and as a result, his tires are toast. I think he is at -4 camber but -1.4 toe which I would assume is what is destroying his tires. What would you do in this situation?

Thank you again for the help!

 

Raising the car up is pretty much his only option now...then getting an alignment to set the Toe back to factory specs.
Camber I would aim for no more than -2.5.

 

You would prob need +45 offset.

 

Actually +38 would be good enough...you could go to +45 if you want.