F =ma. The force you need depends on your acceleration requirements. Going uphill, taking turns, slowing down etc all make mass/weight very material. Edit:

F =ma. The force you need depends on your acceleration requirements. Going uphill, taking turns, slowing down etc all make mass/weight very material. Edit: I know weight and mass aren't the same but we are all considering the same gravitational pull so we can disregard the pedantic argument...