Got a BD Immortal Pro CF bike back in March. Probably have about 2K on it, and love every minute. Well, at least until this morning.
I was stopped at a stop light about 6:30 AM on my way for a metric century. The light changed, and as I started to pull away there was this god-awful "sprang" and the chain came off. I hobbled back to the curb, and what do you know. My Ultegra rear derailer was a mangled mess hanging off by the cable.
I've had no problem with the derailer save a minor adjustment after about 300 miles. There was not warning or other indications. I always down shift when I'm approaching a stop, so I was in low gear.
Any idea why this happened? I'm really bummed, and I need to get it fixed by next weekend.