According to one example, a posterior-stabilized femoral prosthesis (12) for a knee arthroplasty. The femoral prosthesis can include medial (18) and lateral (16) condyles, a femoral cam (22) and a recess. The medial and lateral condyles can be shaped to articulate with a tibial articular surface of a tibial bearing component through a range of motion, in which full extension corresponds to zero degrees flexion of a knee joint and positive flexion corresponds to greater than zero degrees flexion of the knee joint. In a sagittal plane, the medial and lateral condyles can define medial and lateral multi-radius curves, respectively. The medial multi-radius curve (46) can have a single common radius (R1) swept through a first angular extent to define a single arc (A) length that extends from between substantially -20 degrees flexion to substantially 90 degrees flexion, inclusive.
