Toward the end of yesterday's ride, I stood an hammered to cross a road. When I did, I heard a loud metallic noise. A quick look didn't reveal anything wrong. Today, about 12 miles into my ride I discerned a bit of thump. A glance at the back wheel showed pronounced wobble. I found the source of yesterday's metallic noise. When you are cranking out serious quadpower, things can break.

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