wheels sizes offsets

Hello everyone, I need advice on these wheel specs and tires I’m planning to put on my 2014 Veloster. I’ve done some research on these forums and it has helped me quite a bit. I wanted some advice and better understanding on this specific setup. I have three options on the same wheel but...

whats the biggest wheel size you can get in the front and the back without rub? looking on doing 8.5 in the front and 9.5 in the back? need to know what offset i can get away with. without poking to hard and rubbing on the inside.