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Install Shimano SW-R9150 Satellite Shifter on a Time Trial (TT) or Tri Bike

I was disappointed to discover that the Shimano Di2 system on my Trek Speed Concept didn’t have enough buttons to support manual shifting or D-Fly (i.e. changing pages on your Garmin). I can live without the manual shifting, but not D-Fly, so I set to figuring out how to add extra shifters to the aerobars on the bike.

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