Well i measured from the 4 bolt holes used on my rolla AE92 and it was 100mms from the centre of each diagonally across. So 4x100 in that case but it is a multi stud pattern so may fit others as there are 8 holes in total. I measured the diagonals of the other 4 holes that weren't being used on my rolla at the time and it was about 115mms across.