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Why aren’t these bikes using a hub generator to produce the necessary energy to automatically recharge the batteries for the bike computer and shifting motors?
by kuschku 4y ago
Why aren’t these bikes using a hub generator to produce the necessary energy to automatically recharge the batteries for the bike computer and shifting motors? Or am I missing something?
- wl 4y agoDi2 is mostly popular among the performance cycling set who likes to go fast. The ~5% drivetrain power loss you'd get from a dynamo isn't attractive in that market. Also, Di2 requires charging every couple of months. It just isn't worth it. I have seen some randonneuring bikes with a dynamo with USB charging for topping up the bike computer and the like. Commuting and utility bikes tend to just use the dynamo for lights.
- kuschku 4y agoThat’s a market that’s entirely foreign to me, I use my bicycle entirely for commuting, buying groceries, etc so I’ve got a hub dynamo powering the lights. I’m honestly surprised that there’s no super-low-power hub dynamo for this segment, but if it’s all people using bicycles for planned trips, they can take charging into account when planning trips.