You are reading a single comment by @edscoble and its replies.
Click here to read the full conversation.
-
Can be done, but the normal 30mm BB30 spindle is too narrow for a BB86 shell width, the recent BB30a spindle/BB386/etc. may fit as they're wide enough.
As @mdcc_tester quite rightly said, the bearing is smaller and thus more prone to wearing out sooner than later (look at American Classic's hubs that use smaller bearing).
edscoble
Apparently even 30mm spindles fit BB86: http://rotorbike.com/catalog/default/rotor/road/bottom-brackets/bb86/bb86-press-fit-4130.html