A femoral component for a knee prosthesis, the femoral component comprising: a medial condyle having a convex medial articular surface defining: a medial distal-most point, and an arcuate medial condylar track extending posteriorly along said medial articular surface from said medial distal-most point, said arcuate medial condylar track defining a medial radius of articulation; and a lateral condyle having a convex lateral articular surface defining: a lateral distal-most point, and an arcuate lateral condylar track extending posteriorly along said lateral articular surface from said lateral distal-most point, said arcuate lateral condylar track defining a lateral radius of articulation, said femoral component defining: an articulation axis passing through said medial radius of articulation and said lateral radius of articulation, a transverse plane tangent to at least one of said lateral distal-most point and said medial distal-most point, a coronal plane perpendicular to said transverse plane, parallel to said articulation axis, and tangent to at least one of said medial articular surface and said lateral articular surface, and a sagittal plane perpendicular to said transverse plane and said coronal plane, said sagittal plane mediolaterally positioned to bisect said articulation axis, characterized in that said arcuate medial condylar track defines a constant condylar spacing from said sagittal plane, and said arcuate lateral condylar track defines a divergent condylar spacing (CS1, CS2, CS3, CS4) from said sagittal plane as said lateral condylar track extends posteriorly. a medial distal-most point, and an arcuate medial condylar track extending posteriorly along said medial articular surface from said medial distal-most point, said arcuate medial condylar track defining a medial radius of articulation; and a lateral condyle having a convex lateral articular surface defining: a lateral distal-most point, and an arcuate lateral condylar track extending posteriorly along said lateral articular surface from said lateral distal-most point, said arcuate lateral condylar track defining a lateral radius of articulation, a lateral distal-most point, and an arcuate lateral condylar track extending posteriorly along said lateral articular surface from said lateral distal-most point, said arcuate lateral condylar track defining a lateral radius of articulation, an articulation axis passing through said medial radius of articulation and said lateral radius of articulation, a transverse plane tangent to at least one of said lateral distal-most point and said medial distal-most point, a coronal plane perpendicular to said transverse plane, parallel to said articulation axis, and tangent to at least one of said medial articular surface and said lateral articular surface, and a sagittal plane perpendicular to said transverse plane and said coronal plane, said sagittal plane mediolaterally positioned to bisect said articulation axis, characterized in that said arcuate medial condylar track defines a constant condylar spacing from said sagittal plane, and said arcuate lateral condylar track defines a divergent condylar spacing (CS1, CS2, CS3, CS4) from said sagittal plane as said lateral condylar track extends posteriorly.