Absolutely! I've seen (and owned) too many frames that filled with water. It's way easier to help it get out than to try to stop it getting in. Just use my patented Jiggle Valve .FISHLEG said:
my bottom bracket shell has no way for water to get in either. There is a stream at my local trail that is not possible to ride through, but you can walk across a skinny downed tree that is layed across it while balancing yourself up with your bike in the water... it totaly submerged my bottom bracket for over a minute... I took off the bottom bracket fully expecting water to por out, and there was no water at all...ohpossum said:Rather obvious, but before you get drill-happy, double check there is a way for water to get to the BB shell. Some bikes with highly machined BB areas (Ventana, Turner) don't have a way for seat-tube or down-tube water to get in.
Only if the BB shell is open to the down or seat tube and they are open to the air.FISHLEG said: