I feel a little silly asking this, a bike isn't that complicated a machine, and I've been riding bikes for like 30 years, but I can't quite figure out what's going on here. I ride an older, but well-maintained aluminum frame Trek Roadbike, got it new shifters last summer actually.
Anyway, I often hear like this rattling or clunking sound, like something hitting the spokes or frame. Almost as if I have a stick stuck in the frame or something. I noticed this a little last summer and initially thought it only happened when I peddled, but it happens sometimes when I'm coasting as well. It does seem to happen more when I'm peddling hard, and or, at higher gear ratios, and or going fast.
I've flipped it over and spun the crank a few times but cannot duplicate it. I've looked for debris in the spokes, crank, or anywhere else but have not been able to locate it. I believe I experienced the clunking sound both before and after the new shifters were installed as well. Anyone know what's going on here? Should I be concerned?
Thanks