Originally Posted by
RChung
IIRC, PowerAgent reported torque not at the crank but rather reported torque at the hub -- so if you're used to thinking about torque as crank torque, you would need to multiply the hub torque by whatever gear ratio you were using to convert it to the units you're used to seeing. So if you were pedaling, say, a 52x13 gear, you'd need to multiply the hub torque by 52/13 = 4 to get crank torque.
That makes sense of his reported numbers. If the 8 Nm torque was measured at the hub, it would scale to around 30 Nm at the crank, which would equate to a power of around 280 W.