When I bought my new aluminum Pinarello frame a couple of years back, the dealer that sold it to me made a point of telling me it had a service life of about 5 years of heavy riding. I asked him to define heavy, and he said about 10,000 miles a year. Most folks don't ride 50,000 miles in a lifetime, let alone 5 years.

I hedged my bet, though - I put about 2,000 miles on it and then sold it off to some sucker........

I still have my CF Giant. I love the way it rides, and have about 6,000 miles on it so far. Haven't ridden it much in the last 2 years though. Despite being a nice ride it just ain't as pretty as my Italian steel, and I like looking at them a lot more.