We've had over a decade of experience selling electric-assist bicycles and installing aftermarket e-assist kits.
The newest wave of e-bikes feature mid-drive motors. Available as complete bikes only, their frames accept a drive unit in place of the bottom bracket shell and often have sleek downtube mounted batteries for an unparalleled clean aesthetic and neat, tidy OEM look. The assistance is smooth and seamless and they often have the most power, with some models able to provide electric assistance up to 28 MPH!
Mid-drive may be the newest technology to hit the market, but the ubiquitous hub motor still can't be beat for its ability to be mounted on existing bicycles, opening up the possibility to add electric assistance to recumbents, trikes, or just that favorite old Trek you're not ready to give up yet. With assistance levels up to 20 MPH and the ability to add push-button throttle for those that may have trouble with sustained pedaling, they're perfect for allowing riders of any ability level the freedom to enjoy long distances while keeping up with faster friends.
10 or more years ago, that meant rudimentary friction-drive units and the first wave of hub motors with big, heavy battery packs and limited range. Now, today's E-Bikes and Conversion Kits have little in common with those early examples.