The motor in the rear wheel is a BMC from EV Tech.
http://www.texaselectricbikes.com/catalog/brushless-geared-motor-p-163.html
I changed the wires inside of the BMC motor to make it work with Crystalyte controllers, turning it into a Puma motor. My previous bike had a front 5303 Crystalyte motor, but I like this one better. The BMC is half the weight of the Crystalyte, so my bike rides better and is more maneuverable. The no-drag freewheel allows me to coast silently past other bikers and pedestrians. The geared BMC motor provides lots of torque for climbing hills, much more than the Crystalyte.