ok thanks for all the input. i was looking at some ls mesh that i have and on the wheel is says 15x6 JJ 45. so 15 being the diameter of the wheel, 6 being the width and 45 being the offset. but do not know what the JJ is for or what it means. but i do have a better understanding of the whole wheel thing now. with the offset being 45 and the width being 6 on the oem ls mesh this setup sits about a half inch to a inch in the fender front and back. so i am figuring with the .5 less offset but the +1 width on the wheel that i am looking at it should relatively sit about the same. thanks again.