During a ride yesterday afternoon, I sprinted a little bit on a flat road, heard a "prang" sound, and felt my chain slip over the rear cog every few revolutions when I pedaled hard. I knew my chain was not worn because I had just cleaned it, measured it with a Pedro chain checker (
Chain Checker Plus II » Pedro's NA), and lubed it the day before yesterday. When I got home, I discovered a broken link in my chain. I am quite sure that there are < 2,000 miles on this chain so I don't know how this could have happened. And no, I am not powerful. Luckily, I have an Ultegra chain bought during Thanksgiving sale, so that went on today.
