The only 10.5T motors currently available are the Novak SS Pro 10.5T (sintered rotor) and the Novak EX Sport 10.5T (bonded rotor). The discontinued 4300 motor has been replaced by the new EX Sport.
The Novak motors are sensored and require a speed control, such as the GTB, to maximize the sensored features of the systems.
In addition, the Novak motors are protected against thermal overload when used with Novak controllers.