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Originally posted by dd74
BG: I'm actually not a big guy. 5-6 or so, and 160#. But my sprint tactics are balls out. I've cracked a Scapin steel frame to useless junk, and ruined a fair share of cranks.
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Wow that sounds excessive! I was a 165# sprinter and only saw one DA crank fail (cracked but did not separate) in 2 years of racing. What length cranks are you pushing? That Scapin frame could have already been cracked or fatiqued before your legs finished the job. Not trying to sound cricital but the Cat 1 - Pro's that I used to train with never saw the failure rates you're quoting. Maybe a string of bad luck for you?
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BTW: I once had an old DA rear derailler (sp? I know it's spelled wrong). I blew that thing apart racing around the hills at UCLA. Lasted me two months. 
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Again most of the U.S. pro's were earning a living on DA so probably just bad luck that day. Either way I don't think you could go wrong with any of the high-end groupo's out these days.
Man all this talk about bikes makes me want to go out for a spin today.