It's more the 45 profile that won't be helping front rub at your suspension height. I've not seen many running 275/45. Are you T28, 30 or 32? Changing tyres will help eliminate the rub, but there are a couple of other, much cheaper, things you can do. Is it rubbing on the inside of the tyre or the outside?
If it's the inside, you can take the wheel off, get a heat gun on the inner arch and push it back a bit where it rubs. That is usually enough to push it out of the way.
If it's the outside, it's usually on the screw head that holds the arch trim in place. You can remove that screw, push the trim up behind the little tab and bend the tab back up a bit. That is usually enough to stop rubbing on the outside.