• Fabian Cancellara's (Radioshack-Nissan) le-tour Shimano Dura-Ace rear derailleur .. equipped with aftermarket pulleys and Nokon cables at a quick galance, so I guess he feels there's a need to 'tune' standard equipment?

    Nokon is standard equipment. ;)

    The oversize pulleys supposedly reduce drivetrain losses.

    They are not drilling holes in parts, they are merely using different parts.

    ie. I have Shimano drivetrain but I don't use PRO bars.

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