Originally Posted by
Hypno Toad
As promised earlier - here's the picture of the drive-side bearing after 1,200 miles of riding.
A bad bearing. If any bearing isn't packed with grease it will fail and failure will be accelerated by dirt ingress and/or water intrusion. Has nothing to do with BB30. Also, BB30 bearings aren't all the same. Some are crap with high tolerances aka ABEC-1 and other like ABEC 5 or 7 are much more robust. Also, ceramic bearing which are unnecessary in a BB30 application last longer under greased.