Joined: May 2010
Posts: 591
Likes: 1
From: Bucharest, Romania, Europe
Bikes: 1989 Krapf (with Dura-ace) road bike, 1973 Sputnik (made by XB3) road bike , 1961 Peugeot fixed gear, 2010 Trek 4400
many thousand of kilometers have past in harsh condition over my dura-ace, 21years later (present day) it still works, and no strange noises.
On a russian xb3 made in 1963, it still works (that thing is built to last, at the expense of the weight, it's over-dimensioned)
On a fixed Peugeot, the BB is still original (1973)
Conclusion: BB are very durable on road bikes.