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Old 02-20-14, 03:49 PM
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Gonzo Bob
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Join Date: Oct 2003
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Bikes: Vitus Aluminum, DiamondBack Apex, Softride Powerwing 700, "Generic" Ishiwata 022, Trek OCLV 110

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It will work. The little sticker on the shifter (and perhaps the directions) aren't very clear, but what they are trying to say is that the rear shifter will shift RD-7400 (the older Dura-Ace rear derailer from 6/7/8-speed era) at 8-speed spacing and the RD-7700 (the "9-speed" Dura-Ace rear derailer) at 9-speed spacing. This is because the older Dura-Ace had a different pull ratio than the new Dura-Ace. All other Shimano road rear derailers, and all other 2:1 pull ratio Shimano mountain rear derailers (9-speed and under) will work with those shifters for 9-speed.
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