So I finally measured my 10 speed chain, not due to any issues, just because I see it recommended so often.

Well, it's 3/8ths stretched. It's about 3 years old, around 4000 miles on it. FSA double crank, and Ultegra 6600 rear cassette. I dont have any skips, nor do i see any strange wear issues. No shifting issues that I am noticing.

So, it appears my chain is well past due, but things I read say that the cassette may be damaged at this state of the chain, replace it also. Some people say just change the chain, and see if it skips. Some people say ride it until theres a problem.

What might you all say?

Thanks.