Nissan knows whats up, this is a direct quote from a nissan traing aid.
" Wheel Offset
Wheel offset is the distance between the
center line of the wheel and the wheel
surface that contacts the hub. Most Nissan
and Infiniti wheels have a positive offset
between 45 and 50 millimeters.
Proper wheel offset is as important to
handling and stability as any alignment
angle. The majority of aftermarket wheels
installed on Nissan and Infiniti vehicles
are constructed with negative offset
(“reverse” wheels). "