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. Spanninga Halogen Light Kit $32.00 Spanninga Radius Headlight $29.00 Spanninga Vector Xs $34.00 Spanninga Vesta Dynamo, 6 volt $23.00 Spanninga Dynamo (or light) Bracket $5.00 B&M Retro Light w/ Standlight and Switch $49.50 B&M Retro Headlight $35.00 B&M Lumotec Headlight $16.50 B&M Lumotec Plus NDI (with switch & standlight) $39.00 B&M 4D plus Tail Light $39.00 B&M Headlight Mount $3.50 Velox Rubber Generator Cap $2.65 Seatstay Generator Mount, Aluminum $18.00 Spare B&M Light Bulbs $5.00 Zinkens-Bracket $19.00 VO Light Bracket for Rack Attachment $6.50 Low Down Type 2 Light Mount $25.00 Wire for Generator Lights $2.00 All images and text copyright Velo Orange, LLC 2006, 2007, 2008.