I just came back from america's tire co. and they couldnt find anything that's causing the rubbing on the fender they said there's no way that its going to rub, but I definitely here rubbing when I enter a certain freeway on ramp which I dont hear with my old stock rims and wheel (195x165x15) before.

I'm really getting confused, how can I prove to them that I really hear rubbing on the fender and I think its coming from the back.

I wouldnt mind changing to 215x45x17, but if I do that and it still rubs they might not change the tire anymore, and Ill be stuck with the rubbing issue