CampyBob; if a CF frame cracked instead of denting like a steel bike would you're right you can't ride the CF bike any longer, but with the steel bike you could easily ride it back home and not call someone to get you. Also like I mentioned for touring, if you crack a CF frame somewhere you're buying a new frame assuming where your at has frames of any material available, but with steel even a drunk with a welder which is going to be a lot easier to find then a new frame, can get you up and going if a steel frame cracked.
I never said that CF was delicate, what I said (or meant to say) was under certain conditions they are indeed more delicate than steel. This why certain types of damage that steel would laugh at will cost you a frame with CF, scrapping type of accidents are fatal to CF (remember the days when chain suck would saw through a chain stay?), I had a friend who's 5 year old daugher went into the garage and while goofing around knocked his roughly $6,000 CF Bianchi over and the top tube hit a bench vise which cut the C fibers and the bike shop totaled the bike (this was before CF repair places started to pop up). Also, and you know this, you have to be really careful about torque values of anything made of CF or you'll stand the risk of crushing CF and experiencing rapid failure of the part; on that same note I can take my index finger and thumb and squeeze hard enough to cause a frame tube to give...not give in all the way, but it does give, and anytime a CF part gives like that it puts undue stress on the fibers and could break some of the fibers which could eventually lead to failure. Of course under certain circumstance a high quality CF bike may be better at damage prevention than a high quality steel bike, however after such an event with the CF bike it is highly recommended by ALL CF manufactures that you have the bike inspected professionally.
I wrote an email to FSA concerning how often should a CF seatpost be replaced and here is the text of that letter:
Hi Froze,
I cannot give you a set timeline on how often to replace parts as riding style, frequency, and conditions are too varied to say “This post will last X number of years”.
I can tell you that these are lightweight race components. They do have a lifespan, and do need to be maintained/check regularly. We have some people on the same post for 10 years, we have some guys that break them and I have no idea how… it all depends on the rider.
I will say that carbon components should be replaced more often than aluminum, and 3-5 years is reasonable estimate, but I do not have an actual timeline for you.
Patrik
Patrik Zuest
Technical support
Full Speed Ahead/Gravity/Vision
I also wrote an email to Giant concerning what they do with their previous season racing mtb's which I can't find now, but in essence what they said was that a couple of bikes are given to each team member, one for back up, after about 1/2 the season is gone they switch to the back up and deregulate the first one to the back up position because of the potential the CF frame is beginning to go soft, at the end of the seasons all bikes are returned back to the factory where they are put through a series of tests including E-Ray and one other test which I can't recall, if a bike is found to have even the slightest bit of damage it is crushed, any found to be fine are sold as used bikes; they also said if a bike is crashed there is a very high chance the bike will be crushed.
JSESKI
I agree with you to a point, the really high end CF racing bikes are very thin walled tubing, those are strictly recommended for professional racing and not for everyday riding, but a lot of wealthy people buy them for everyday riding purposes. A pro race team gets their bikes for free so if a bike gets damaged one way or another, or a new season begins, it's simply replaced, most of us here can't afford that luxury.
I hear you about working in a shop, my LBS mechanic said that he would never buy a CF bike after working at that LBS for the last 10 years, but he did admit he's the odd one out, but that's only because the rest of the employees do fast group riding and some race so they want the lightest bike they can get, but while my mechanic does do fast group rides he doesn't race nor does he care about whether or not he's on some high end carbon bike to garnish attention with the group or at the pub. He liked my Lynskey so much he was looking at them on the internet to figure out which one he wanted to buy for this next season after I let him ride it for awhile.