A knee replacement system includes a femoral component including a lateral
condylar articulating portion and a medial condylar articulating portion,
a tibial tray including an upper articulating surface, and a tibial
insert including (i) a first articulating portion for articulating with
the lateral condylar articulating portion with a first condylar dwell
point, (ii) a second articulating portion for articulating with the
medial condylar articulating portion with a second condylar dwell point,
(iii) a lower articulating surface for articulating with the upper
articulating surface, and (iv) a coupling member for coupling with the
tibial tray and defining an axis of rotation about which the tibial
insert rotates with respect to the tibial tray, the axis of rotation
intersecting the upper articulating surface at a location posterior to a
dwell axis including the condylar dwell points when the dwell axis is
projected onto the upper articulating surface.