Your chain should also be the first thing you check if you hear a rattling sound while riding. It could mean the loose, excess chain is contacting your frame (this is commonly called “chain slap ...

Narrator: If you're hiking pretty much anywhere in the US, this is one sound you don't want to hear... [Audio of rattlesnake rattle.] The warning of a rattlesnake. Now, just because a rattlesnake ...

Then you hit the pavement and the rattling starts. Maybe you couldn't hear it on the unpaved road, but every expansion strip on the Interstate makes your car sound like a tin can full of bolts.