Joined: Jul 2007
Posts: 8,576
Likes: 3,509
From: South shore, L.I., NY
Bikes: Trek Emonda SL7, Cannondale Topstone, Miyata City Liner, Specialized Chisel, Specialized Epic Evo
No issues in 5 years using Di2, I’m heavier than you. It’s not the shifting to worry about, it’s stuff like wheels, carbon bars and seat posts, etc.