eZee Kits
Grin has sold eZee geared hub motor kits since 2007, and they remain one of the lightest, quietest ways to add assist to a bike. The eZee delivers an excellent torque-to-weight ratio in a compact package and freewheels for easy coasting, which makes it a favourite for efficient, lower-weight builds where you don't want a heavy motor along for the ride. It fits slotted dropouts. For the full technical rundown, see the eZee info page.
Canadian