I am running 265/70-16's on stock rims for winter use & they reqd. minor trimming on the front cladding.
The 265/50-20's I use for summer required me to trim a little more(same spot, just had to remove more) due to the more negative offset of the new wheels.
The backset on the dubs is 5" which brings the wheel out just slightly past the fender.
I really like the "rugged good looks" of that teflon wheel.
As far as trimming goes...don't sweat it, it's super easy to do & if you didn't know it was done, you wouldn't even notice.
Hope any of this helps.
Ldub