Can somebody tell me the stock wheel offset on my 2013 GT with the optional 19" aluminum five spoke wheels. I want to replace them with some TSW wheels and they come in either 20 or 40 offset only. Which would be better?
Thanks

 

I believe the stock off set is 44. The 20 off set will poke to much. You should be good with 40. Someone with more knowledge will jump in here I'm sure. I'm still new around here.

 

Rim width has an affect on how much things poke out as well, you cannot just look at the offsets of two different width wheels.

The forums have an offset calculator that allows for the input of all the different sizes and then compare the two wheels. https://themustangsource.com/tire_rim_calculator.php

 

There's a YouTube vid that reviews some TSWs that have a +40 offset. 20 is too much.