How I would find out what it is, put it in a jack stand get down on the floor and watch as it rotates to see where it is rubbing. If it is not the brake it may be a wheel bearing. Just my 2 cents.
The Rammin' Fool from Maine
Stubby Antenna, Bed Net, Toyo Open Country tires, Bilstein 5100 Ride Height adjustable set at 2.1 ..Tow Hooks in house ready for install. More to come!