On 2/11/2018 10:02 AM, Joerg wrote:

That is how I used dynamos in the past and would like to do that again.
However, in the US it is hard to find a reasonably priced complete front
wheel with a hub dynamo and I don't want to spoke up my own. So it'll
have to be a bottle dynamo (rollers went the way of the dinosuars) and
then I'd like to try Frank's mode with an O-ring and run it on the brake
surface nstead of the tire.

If we were ever to move to dynamos in the U.S. it would require that
bicycle manufacturers have their dealers offer a dynamo wheel upgrade
and light on new bikes at a reasonable price. Spending $200 on a new
wheel and another $200 on a decent dynamo light is just not going to
happen for almost anyone. Yet the extra cost to a bicycle manufacturer
would be small, $50 max for a higher-end SP or Shimano dynamo plus a 200
lumen headlight and a tail light. The shop could mark it up to $100.