Originally Posted by
desertdork
Just a guess...but a reasonable guess at that: dry or dirty BB threads. Manufacturers don't always adequately lubricate the threads; and some riding conditions can carry fine grit into the threads. Did you ride (or transport the bike) in wet conditions? Removing the BB cups, cleaning the threads and regreasing & reassembling could resolve the issue. Will require a couple tools to remove the crank and BB...and a bit of spare time.
Oh yes. I commute daily and the bike gets filthy at times. The Michigan ride was from Petoskey to Wilderness (read: "lots of sand"). Funny, I thought this type of BB was pretty resistant to grit intrusion. I will go pick up requisite tools and give her some PM this evening. I noticed the crank retention screws have a torque spec. How critical is that? I don't own a torque wrench.
Originally Posted by
desertdork
...Since you stated you fixate on such things, have you acquainted yourself with Sheldon Brown's writings on such?
Not yet, but I will! Thanks.