tj021

I'm looking to put 20" rims on my Journey and everyone I talk to says the rim size that comes up (20x9) is to wide and will rub. Does anyone know what size rim(20x7.5,20x8,20x8.5) I can put on it and what size tire would work best(245/45-20)? And what offset I should use? Any advice would be helpful since it doesnt look like the rim shops in my area know much