FIG. 1 is a top perspective view of the rotor hub;
FIG. 2 is a bottom perspective view thereof thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a back thereof;
FIG. 5 is a left-side view thereof;
FIG. 6 is a right-side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof; and,
FIG. 9 is a cross-sectional view thereof.
The portions shown in dotted lines form no part of the claimed design.