another weird noise??

[s14slide]

Well on my drive home tonight I had the windows down even though it was cold as f&*(.  At first I had the radio up loud and heard the noise as I pulled up to a light.  So I turn the radio down and I notice as I pull away from the light slowly I can hear a noise from the left front wheel and it sounds something like the sound you get from rice krispies when you pour milk on them, but metallic sounds almost.  It's kinda hard to explain, but I'm trying so bear w/ me.  I noticed it makes the sound whether or not I'm on the brakes but I can only hear it when I'm going slow, like just starting or almost stopping.  I have the stock hubcaps and 15's, but I've never heard this noise before, and yes my weird self often turns off the radio just to listen to my N/A car sing/roar.  Anyone have any ideas before I start turning wrenches?  It's too cold and too late to go taking things apart right now.  Thanks for your ideas.