From that information, there is no way to know how much power can be produced at a given speed. Do you have links to web pages or documents providing a more useful level of detail?
The "gradeability" specs suggest that these hub motors are intended to be used in wheels of a specific size and powering scooters of a specific weight... so there must be more information.
The "gradeability" specs suggest that these hub motors are intended to be used in wheels of a specific size and powering scooters of a specific weight... so there must be more information.