Purplegolden, Have you been able to get your question answered about the Ultegra drivetrain vs. the 105?
What exactly constitutes the "drivetrain" ? Is that just the chain, chainrings, and rear cassette?
I too am trying to find out more info - trying to decide between the Ruby Comp with 105 or Ruby Pro with Ultegra/DuraAce. Any info you have I'd appreciate.



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