A picture showing the bottom bracket standards "problem". From Kogel (HERE as of 2014/08).
Available as a .PDF from HERE as of 2014/08; also cached HERE.
Part of the 2nd page (top chopped off):
The above document lists bearings as "6808 series", but standard 6808 bearings are 40 mm ID and 52 mm OD, this is probably an error and "6806 series" is intended, with 30 mm ID, 42 mm OD, and 7 mm width.