Originally Posted by
AU Tiger
That's interesting. I never considered that before. But my bikes are all kept in the garage, so humidity could certainly have been an issue.
If the difference in temperature and humidity is high enough, the bikes will "sweat" for a few minutes as humid air condenses on the relatively cool surface temperatures of the bikes. This is when rim brakes are most apt to squeal (at least for me).
I'm probably killing my steel bikes just a
little bit each time I ride them (in the summer, at least). Going from 72 degrees and dry to 90 degrees and humid probably deepens any interior surface rusting just a wee bit each time.
My primary bike has hydraulic disc brakes, which seem about impervious to
everything.