Old 12-23-12, 10:03 PM
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Join Date: Feb 2005
Location: Oklahoma
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Bikes: Trek 5500, Colnago C-50

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I used a Dremel to grind down the slot on my wife's OCLV front derailleur hanger to accommodate a 49-39-28 crankset.
The seat tube on the 5000 series OCLV's is round. My C-50 Colnago has the same type of "braze-on" FD hanger as the Treks.
I've always assumed that clamp-on FD's were not preferred on CF tubes due to potential damage.
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