Gram Lights 57xtreme fitment help.
 

Hey guys, for the past 2 weeks I've been shopping for wheels for my 2017 GT86 and using the awesome table that was put together for reference on fitment. I am also using the WheelItFit app that was put together, but I'm having some doubts. So I'm looking to get a set of 57xtremes and I also want to lower the car to get rid of the wheel gap. I've been looking to run 18x8.5 upfront and 18x9.5 in the rear. But unfortunately GramLights only has those specs in a +42 offset for for the 8.5 and a +40 for the 9.5. I just wanted some advice on if they would fit with no rubbing and no modification to the body so no fender rolling. I'll be running Tein Flex Z coilovers for the drop and I'm trying to run as little camber as possible because I want flush and not a big fan of stanced wheels.

TLDR; can I run Gram Lights 57xtremes 18x8.5 +42 front and 18x9.5 +40 rear with no fender rolling and close to 0 camber with 1" of suspension drop on my 2017 GT86?

I'm lowered about 1" on those wheels and can tell you that 18x9.5 + 40 works in the rear with 265/35/18 tires with no fender rolling. I have 18x8.5 +33, 235/40/18 in the front, which sticks out a bit more than the +42 offset. I have about 1.5 deg negative camber in the front and rear which is hardly noticeable - definitely not 'stanced'. Check out the link to my build page in the signature for pics and you'll see.

Is 1.5 deg enough to cause excess wear though?

Not significantly

Not that I have seen with my own car. Toe affects tire wear more than camber in general. Here's an article that might help:
https://drivermod.ca/2016/01/29/how-much-camber/