Not sure if you are still considering large and wide tyres. I have an 850 with 17x7.5" wheels (same offset as OEM) and 215/45 tyres. They rub on tight turns. So I did the following:
1) Check the gap between the steering stops, ie, between the nylon pad (on the control arm) and the bit on the turning knuckle thats supposed to touch the nylon pad, at full lock, both L and R side. The gaps are same - about 1mm.
2) Drill out the rivets that secured the nylon pad to the control arm. I used a wet towel to cool the rivet down every couple of seconds to prevent the nylon pad melting by the heat.
3) After the rivet heads are cut by the drilling, pry out the nylon pad.
4) Use a strong grip plier to twist and pull the remaining parts of the rivets out. Needs some patience here.
5) Use the nylon pad as template, cut a same size 1.5mm thick piece of plasic or metal (I used vinyl) and drill two holes (they are ~5mm diameter).
6) Put the plastic piece sandwiched between the nylon and control arm, pop rivet them to the control arm using new rivets.
7) Apply grease or brake squeal stop to both touching surfaces.
Repeat for the other side.
No more rubbing. Whole job took about 3 hours. Forogot to mention jacking up the car and steer the wheels to right when you do the right side, and left when you do the left side. Turning circle diameter is now about 0.5m bigger.