Does anyone know if a 31X10X15 wheel would rub on my 1990 Dodge Dakota 4x4, and if so what is the maximum size tire I can put on her without it rubbing?

I have 31s on my '95 Dak. Same basic truck. No rubbing except on the air dam while turning tight. You could alwyas crank your torsion bars a little bit. I raised mine about 3/4" before putting on the bigger tires. Don't have to though.