The diameter of the motor pulley is 30mm and the electric current of the motor will increase
The diameter of the motor pulley is doubled. The power of the motor shall be increased in cubic relation
I don't know if there is a formula. The feeling is related to the size of the load, the power of the motor, the speed, and the speed ratio
This is not sure, and there are a lot of uncertainties, and it's only possible to measure it with a current meter
