Originally Posted by
mrvile
Generally the right side (drive-side) is reverse-threaded.
Right. I just bought one. They are not marked R or L, so I just carefully tried to screw it into either side of the replacement BB cartridge to find out which one was which. Then I marked them with a sharpie. That ink came off shortly into my installation quagmire.
Here is the thread in C&V (don't worry, we've established that my BB shell is a special case):
http://www.bikeforums.net/showthread.php?p=10042488