BionX 250
Here's the BionX 250 I built for my wife's commute. She already owned and loved the Gary Fisher Marlin--a bit of a hybrid with a crank and components better suited for the road than for the trail. It's a 16" frame that fits her well, and we were drawn originally to the BionX system for that reason. Other electric bikes we looked at were built on a medium-large frame that were too tall and too long for her. Also, she wanted to preserve the riding experience and BionX seemed ideal for that. She had one stipulation: that I not ruin the feel of her bike. She grins when saying that I haven't.