it will rub if they are 12.5 wide. In hard flex at lock off road it may knock a plastic fender lose.
10.5 wide will have less issues but still will rub.
I have seen 33x12.5 on a 2" rub in a hard flex, but just very lightly
The lowest cost way to have larger tires on a Jk is to trim the plastic flairs. remove and 35"s fit easy even 37". with the right off set.