I took my specialized dolce elite into the LBS for a little tweaking today for a shifting issue, and I'm told in addition to fixing the shifting issue the chain needs to be replaced.
The bike was bran new when I bought it in June/12 and its been ridden 4000+ km. Is this normal that a chain wears out within 6 months? Or is the LBS selling me stuff I don't need?. How do you tell when you need to replace the chain?.