Custom Oak Cycles 650B French Randonneur Project.

Ed, how does the wireless power work? Surely it can't just pass juice through the metal of the frame.

ftfy

Unless you're Tesla, electricity needs a circuit. Somehow you need to have two conductive paths from the dynamo to the light that are insulated from each other. But you *can *get away with just one insulated wire and use the frame as the other half of the circuit.

This system is explained here: http://www.peterwhitecycles.com/schmidt-sl.asp
There is one wire. It contacts the hub via a specially made right hand dropout, the inner face of which is insulated from the rest of the fork.