wondering if anyone knows the proper fitment (with fender rolling if necessary) for a 21/20 combination?

like wheel widths/offsets?

please and thank you!

 

essential the same as any other wheel, fitment with correctly sized tires should be no different

 

i'd imagine the offset would come into play if you were running a 295 on a 21" rim on the rear like this

 

i tried contacting the owner of that car but he won't release the offset information

 

Which would be essentially the same offset if the wheel was a 19/20/21 with a 295 on it. The overall diameter and width will be essentially the same, so depending on how aggressive you want the fitment, start looking at other setups and offsets/widths and order your 20/21's in similar sizes