I have a dura-ace 7800 groupo, all except an FSA crankset that is a compact 50/34. I would like to switch to a dura-ace 7800 standard double crankset 53/39, is this possible without troubles? Cassette using now is a 12-25 105 cassette. Also can a outside baring 7800 BB be used on a 2004 Lemond Buenos Aires frame?
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