I was in an LBS the other day, you know, just looking around, and the guy suggested I try a bike "just for size." Good thing it was just for size, because it turned out this was a $4,000 titanium bike.
Anyway, I was surprised that as I rode the bike, whenever I would coast, the rear wheel or deraileur or something back there would whrrrrrrrr quite loudly -- and I mean QUITE loudly. I'm used to bikes being whisper quiet when coasting, which is something I really like.
Afterwards, the guy gave me some kind of explanation that I couldn't quite hear, and I didn't pursue the point. I think he used the word "hub" in there somewhere. At any rate, he seemed to be telling me this was normal and just how it was. I remember thinking how irritating it would be to spend big bucks on a bike only to have it whrrrrrr loudly every time I coasted!
So what's the deal with loud chain whirring noises. Is this common for high end bikes?