Joined: Jul 2007
Posts: 8,586
Likes: 3,518
From: South shore, L.I., NY
Bikes: Trek Emonda SL7, Cannondale Topstone, Miyata City Liner, Specialized Chisel, Specialized Epic Evo
They use sealed bearings, so no maintenance to be done. Really the only thing to occasionally check is play at the cranks, if so, tighten up. As Kontact stated, if they go bad you yank it and replace. A BB60 for a 105 or so level is $60.