Originally Posted by kaiv
Brendan, these are the same exact sizes and offsets as your 19" set. The poster just calculated the offset to include the spacer (ET21 with a 18mm spacer = ET3, ET22 with a 15mm spacer = ET7; you substract the size of the spacer to get to the final "effective" offset)
Aaaahhh!!! I get it now. Thanks Kevin!