If you run a staggered setup, you can easily get 11's on the back. However, you will be rubbing up front with that size wheel and tire.
I am running 305/35 24's on 9.5" wide wheels with a 31+ offset.
I have some room between the back of the tire and the inner fenderwheel for the rear so I don't see 11's or even 12's being a problem and my wheel sticks out just a hair from the fender well. Its about 1/2" so barely noticeable.
I am rubbing up front on lock to lock. I am running up front during a turn when going down driveway aprons or over parking lot speed bumps...and my suspension is pretty stiff. You might want to reduce that tire size if you are worried about rubbing up front.
View attachment 442781View attachment 442782View attachment 442783View attachment 442784