Originally Posted by
3alarmer
...this is the original dream fantasy of sealed unit BB's. The reality has played out differently.
How? I see bottom brackets at my local co-op that are from the 90s that are still working well. I’ve personally never had a sealed bottom bracket fail on me. I’ve replaced a lot of them through upgrades but not one of them has been because the BB failed.
On the other hand, I see lots and lots and lots of loose bearing bottom brackets that have to be replaced. Even a number of very new ones.