Remember those "bottle"-type dynamos that rubbed against the side of your bike tire in order to power the lights? Well, they've gotten a high-tech makeover, in the form of the fork-mounted CadenceX ...

You had probably all but relegated rim dynamos — also known as bottle dynamos — to the history books, but this very neat dynamo from Velogical may make you think twice about their relevance today.

One of my bikes has a bottle dynamo that presses on the tire and powers the front lamp. The Siva Cycle Atom is a modern-day equivalent, only it won’t rub away your tire or slow you down, and it’ll ...

You had probably all but relegated rim dynamos — also known as bottle dynamos — to the history books, but this very neat dynamo from Velogical may make you think twice about their relevance today.