Agreed, I'm on a +30mm, rim width really doesn't matter, if anything the 10.5's will fit better as the tire will have a slight stretch making the sidewall "shorter" compared to my 9.5's. I'm just basing this off looking at my 255's. It's damn close and I'm sure I can work the liners if there does happen to be some slight rubbing. Obviously suspension set-up will be a factor too.

 

well those are 18x10.5 +43, unmodified factory fenders and liners

which means you could then instead do 18x11.5 +30 with a 285/30 and be where the inside of my wheel is and the outside where your wheel is along with a wider tire between the two.

That’s aggressive and why I poke fun at people who take narrower wheels and tires just to place them outboard with a low offset and force themselves into rolling fenders and such. If you’re going there, just do it right in the first place. Otherwise it's not aggressive, it’s posing.

 

lol...

 

 

Some of them looks like gangsters from yakuza lol