Recently hub generators have drawn a lot of current in the bike blogs, but there is good reason to favor the old bottle generator. A good sidewall dynamo creates only a very tiny bit more drag than a hub generator, but only when in use. Unlike a hub generator, it creates no additional drag when in the "off" position. You can change wheels without loosing power. And bottle dynamos cost a lot less. I also like the retro look of a bottle generator.
On the down side, they can slip in wet conditions if not carefully set up. And some add can wear to the tire. Of course it is also possible to set them up to run on the rim.
We found some new-old-stock Soubitez 89 dynamos with golf "ball lights". What's cool about these is that the light can be detached and mounted on a fender or on a rack. Or you can leave it attached to the dynamo for an uncluttered look, as David did on his Peugeot. These put out just as much power as a hub generator, but the bulbs are 1950 technology so they are not as bright as a modern light. I'll have some of the little rubber caps for the generator wheel soon.
We've just started stocking Busch and Muller generators and lights. We currently have the two 6 volt dynamos as well as two styles of lights. The cool aluminum retro light below is on order.
The B&M Dymotec S6 is particularly attractive as it has about the same efficiency as a good hub generator, is virtually silent, and reaches full power at only 6 mph. We also carry the very affordable Dymotec 6.
We'll have them in the store within the next few days. And I think our prices will be among the lowest around.
Also, we have the hard to find SALSA water bottle cages again.
16 January, 2007
Posted by Velo Orange at 2:00:00 PM