Crunch. Or maybe creak. Kind of like tapping or clicking on a carbon bike frame. Whatever you call it, a sound like that, even if it's not that loud, over time destroys the harmony of a bike ride. Like the drip drip drip of a faucet when you're trying to sleep it becomes increasingly annoying until it drives every other thought from your mind.
I was sure it was the bottom bracket. Partly because every annoying bike sound seems like it's coming from the bottom bracket. Partly because that would be the toughest thing to fix, so that must be it.
But I figured I should try simple things first, because I know weird sounds come from weird places. Like the time it took an hour to figure out that a click was coming from my Road ID dog tags hitting my heart rate monitor chest strap.
Chainring bolts? Nope. Cleats on shoes? Nope. Something in the seat bag? Nope. Not a loose water bottle cage bolt either. But with everything that's easily attached now removed the sound was gone.
I tend to forget that riding a bike constantly rattles it, and that things can and do loosen over time. I eventually noticed my Lezyne pump had managed to become unscrewed where the body meets the plunger. It didn't stand out as much it does in the photo, but there it was, completely disconnected. I tightened it, as well as a couple of bolts on it. Now, once again, the universe is back in balance. And it didn't even cost me any money.
That little piece of black fuzz? That's a slice of velcro glued onto the pump handle to keep it from clanking on the frame, a lesson from a past find-the-noise adventure.