Originally Posted by
bikemig
I liked the sanyo under BB dynamo generator as well as the Union one that went on the seat stays. The only problem with the under the BB generator is that it can have issues in a heavy rain but a fender usu. fixes that problem.
I wish it were still made. It's a pain to have to build a front wheel with a generator hub. No doubt it's a better solution than the under the BB generator but at least that allowed you to retrofit an older bike without having to build a new front wheel.
My wife rarely rides her BB dynamo bike in the dark. In fact, I think her aim is never, but it's ready when she needs it. The chances of her riding at night in the rain are low. If that problem occurs, we will address it.
I got this one at a bike swap meet. You can probably find one there or from craigslist or ebay or one of those bike shops that hoard old bike parts, such as Via Bicycle in Philadelphia.