Need Help from a Charger Member

[4XLGator]

I have a friend with an '09 Charger base model who is wanting to put wheels and tires on her car. She is not a car person and has been ripped off by car places before and I am trying to help educate her a bit so this doesn't happen again. I cannot go with her to tire/wheel/car shops because she lives in Nebraska.

She has stock 17" wheels/tires on her car and wants aftermarket 20's. Is this possible with proper backspaced, offset and width wheels without other modifications (please remember I am a truck guy)? Also, just for her knowledge, what is the proper backspacing, offset and width for a 20" wheel on charger? I also need tire sizes to compliment all this info as well.

Thanks guys, I greatly appreciate your input.