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Shimano resurrects electronic shifting for MTB, but with a caveat
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New mountain bike tech: Shimano XTR Di2 electronic shifting
First Look: Shimano Alfine Di2 Internal Electronic Shifting System | WIRED
Shimano XT Di2 8050 mountain bike group unveiled, debuts wireless setup for all Di2 - Bikerumor
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Cervelo P2 Di2 - The Benefits of Electronic Shifting on the Most Popular Tri Bike Ever - Fit Werx
How does Shimano Di2 Actually Work?| Electronic Shifting 101 - YouTube
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SAVA Electronic Shifting Full Carbon Road Bike Dura Ace Di2 R9270 – SAVA Carbon Bike
First Look: Shimano Alfine Di2 Internal Electronic Shifting System | WIRED
