Tour Tech 2017: Shifters the pros are using | road.cc
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GCN Tech - Shimano Di2 Sprint Shifters are a great electronic hack to add to take your shifting to the next level on your road bike. Shimano make the tiny buttons incredibly
Wahoo and Bryton add electronic drivetrain compatibility to head units - BikeRadar
Shimano GRX Di2 Components: Getting Rolling - Riding Gravel
Di2 Integration: The World's Smartest Bicycle
Change button setup - enable buttons on Di2 shifter hoods