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by throwaway7767 3839 days ago
> I'd be surprised if they didn't recharge it by pedaling. ;)

I'd be surprised if they did. A dynamo adds a noticeable load on the bike, and the people buying this are already optimising for small improvements. Adding a dynamo to power it would probably be a net negative for performance.
2 comments
jrockway 3839 days ago
A dynamo doesn't actually add that much load to the bike, but they're heavy and invasive, the exact opposite of what an electronic shifting system aims to be.

I run a dynamo generator for lights on my bike. The datasheet says it steals about 7 watts of power. I'm a relatively weak cyclist, but I can put out 230W continuously for an hour. The dynamo doesn't matter unless you're racing.

That said I still have good-old-classic 10 speed mechanical shifting. It works so well I don't see the need to add another computer-based gadget to my life.

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wiredfool 3839 days ago
They should generate power from the motion of the shift levers.
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throwaway7767 3839 days ago
> They should generate power from the motion of the shift levers.

How much power would that really generate? You can't make them too stiff, since part of the reason people like electronic shifting is that it's easy to do when your hands are numb from cold.

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