Originally Posted by
tdilf
While riding on wetter days, after going through muddy puddles my bottom bracket seams to grind for about 10 minutes or so and then it slowly goes back to normal while still riding. I am assuming the dirty water is going into the bottom bracket and causing this. Does this mean I have bad seals or just a crappy BB? I have a PF30. My carbon frame also has a door in the BB area for fishing wires through and I am sure that is not water tight - perhaps it is coming through there? Can I get a sealed unit for a press fit BB?
It may not be actually getting into the bearings themselves, but rather on top of the seals. I have a PF30 bb that does that too and so far no long term damage has been done. I wouldn't worry about it too much until it starts costing you new bearings.