In first sorry for my bad English (i am french).
For answered at those who have problems to mount BBS on dual suspension bike, in cause space take by arm pivot. you have possibility to reduce width of BBS gear wheel crankcase. You have 5,5mm material width. On mine i have removed 4.5 in rear of gear wheel axis, . you can see result and explaination on http://cyclurba.fr/forum/368158/bbs01-pressfit.html?discussionID=16086#msg368158