shermer75 – Member
My only drawback is that it doesn’t look quite as robust as a hub dynamo, which would be something I’d consider on a commuter as they take such a kicking
I doubt there’s much to go wrong. An occasional O ring maybe. If it uses bearings rather than bushes, it should last forever (I didn’t notice).
The bottle dynamos I used in my youth were reliable. My only objection was the noise (I hate noise on a bike).
Their advantage was that they could be disengaged so there was no drag when not in use.
Part of the appeal is they have a model for very low speeds.