Originally Posted by
Drew Eckhardt
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The Luxos U has a built-in USB port, but turns it off when the light comes on. Some people also report water ingress issues.
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The paperwork that came with my Luxos U said that the USB port would still provide power with the light on, but that it was limited to less than 100 milliamps. So, you were close to right, as 100 milliamps from a USB port is only a half watt.
Originally Posted by
Drew Eckhardt
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Shimano dynamo hubs allow bearing replacement without wheel disassembly. I'd have bought one if I was unwilling to pay for a SON28.
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The exploded diagrams that I have seen for Shimano dynohubs only have user replaceable bearings on one side of teh hub, not both sides.
I attached the schematic for a Shimano hub I have on one of my bikes.