It wasn't easy holding the ruler in one hand and my camera in the other, but the measurement you can see in the photo is pretty much spot on. I tried it without the camera, and it looked the same.
This chain has about 2000 miles on it. Is it too late to replace it? A mechanic friend told me that if you let the chain wear too long, it becomes pointless to replace it, as the cassette and chainwheels will be too worn to work well with a new chain.
Is there a rule of thumb regarding how frequently Ultegra 6700 chains need to be replaced? I don't ride in the rain... just primo southern California weather. I lube the chain about every three to four rides.
Thanks in advance for any helpful replies.