I was riding my 2007 Specialized Roubaix Triple (alloy mainframe) on a century ride two days ago when I starting hearing a sharp dink sound near the bottom bracket with every hard jolt (there were many). I checked around for frame cracks, saw none.
Later, I developed an additional ping on every pedal stroke.
On a 50-miler the following day, the sound turned to three or four pings or ticks on each pedal stroke.
Afterward, when I put it on a workstand, I couldn't duplicate the rough sound, and the crank turned smoothly.
There's no play when I lever the cranks. The pedals spin cleanly.
I don't mind changing the BB, but how can I tell whether that's actually the problem?
Thanks.