Shimano Di2 Electronic Gears for Road Bikes Explained

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>> YOUR LINK HERE: ___ http://youtube.com/watch?v=3knD7Me_L6w

I give a brief overview of Shimano's Ultegra Di2 11 speed gear system as used on my Trek Madone 4.9 road bike. • Social Media • Facebook:   / goodvelocycling   • Twitter: @jollyvelo • Strava:   / strava  

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