Can’t seem to readily find this info. Any suggestions on where to look?
why does it matter? DA is plenty light
I’d check out old review articles like this one:
http://velonews.competitor.com/2008/06/bikes-tech/shimano-unveils-the-new-dura-ace-7900_76923
For more accuracy and variations break out the spreadsheet and head over to weightweenies.com
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You could go pee before a ride and drop more weight than the groupsets would change.