Quote Originally Posted by tjf9 View Post
My LBS is giving me the 1000 mile guideline for chain replacement as well. The guy at my shop says its the 10 speeds - the narrower chain wears more quickly. My shop measured the chain and said it was getting worn - perhaps their stretch allowance is lower than necessary?

I just replaced my first chain on the Madone at 1.5 years and 6,300 miles. It's an Ultegra 10 speed. It was just barely stretched.....I'd been checking it. The cassette and chainrings were fine. Again, another lightweight rider who spins and shifts on the lighter side. Mr. who is heavier and a masher has broken a chain and bent a chainring. I'm also pretty meticulous about keeping my bike clean.