The question was about the different versions here:
n0 is the no-load max speed and nT is the optimal efficiency speed.
The only thing you need to worry about is matching the motor's nT to your planned modal riding speed. It changes in proportion to battery voltage.
Motor's don't have torque, so 55Nm is meaningless. The torque you get depends on the motor's actual speed, the battery voltage and the current the controller gives.
Chinese motor's are often rated according to their speed. nt = 205 rpm is 15 mph 250w, nt =260 rpm is 20mph 350w. Bafang can change the nt at the same voltage by changing the number of turns in the coils. The speed is inversely proportional to the number of turns. You can change the voltage. The speed is directly proportional to the voltage. That means a 36v 205 rpm motor is the same as a 260 rpm 48v one.
Bafang sometimes mark their motor's with a code number that indicates the number of turns in the windings and hence it's speed. It's a number in brackets, like "(10)", meaning 10 turns per coil. Other times they label the speed in rpm, like "260 rpm".
n0 is the no-load max speed and nT is the optimal efficiency speed.
The only thing you need to worry about is matching the motor's nT to your planned modal riding speed. It changes in proportion to battery voltage.
Motor's don't have torque, so 55Nm is meaningless. The torque you get depends on the motor's actual speed, the battery voltage and the current the controller gives.
Chinese motor's are often rated according to their speed. nt = 205 rpm is 15 mph 250w, nt =260 rpm is 20mph 350w. Bafang can change the nt at the same voltage by changing the number of turns in the coils. The speed is inversely proportional to the number of turns. You can change the voltage. The speed is directly proportional to the voltage. That means a 36v 205 rpm motor is the same as a 260 rpm 48v one.
Bafang sometimes mark their motor's with a code number that indicates the number of turns in the windings and hence it's speed. It's a number in brackets, like "(10)", meaning 10 turns per coil. Other times they label the speed in rpm, like "260 rpm".
