Copy and paste from the How Long Should a New Road Bicycle Last Me thread:
http://www.bikeforums.net/showthread...icycle-last-me

I had about 62,000 km (38,500 miles) on Machak before he was stolen ... and he had a lot of life left in him. He was stolen almost exactly 7 years after I bought him (last Easter).

Incidentally, while we're talking numbers, I had 46,000 km (28,500 miles) on my Brooks B17 before it was stolen with Machak. I had it about 5.75 years, and it definitely had a lot more life in it.