A posterior-stabilized femoral component adapted to articulate with a tibial bearing component in a knee prosthesis, the tibial bearing component including a proximally extending spine, the femoral component comprising: medial and lateral condyles (226, 224) shaped to articulate with the tibial bearing component through a range of motion, in which full extension corresponds to zero degrees flexion of the knee prosthesis and positive flexion corresponds to greater than zero degrees flexion of the knee prosthesis, said medial and lateral condyles comprising inwardly facing condylar walls (238, 239) forming an intercondylar space therebetween, said intercondylar space having a medial/lateral width (ML T); and a femoral cam spanning said intercondylar space to join said medial and lateral condyles to one another, said femoral cam sized and positioned to engage the spine of the tibial bearing component in positive flexion through at least a portion of the range of motion, said femoral cam having an articular surface comprising: a central articular surface that is one of cylindrical and convex across a medial/lateral extent of said central articular surface; a convex medial transition surface flanking said central articular surface and disposed between said central articular surface and said medial condyle, the convex medial transition surface ending at and tangent to a concave medial transition surface that is adjacent to the medial condyle; and a convex lateral transition surface flanking said central articular surface and disposed between said central articular surface and said lateral condyle, the convex lateral transition surface ending at and tangent to a concave lateral transition surface that is adjacent to the lateral condyle, said central articular surface, said convex medial transition surface and said convex lateral transition surface cooperating to occupy from 80% to 91% of said medial/lateral width of said intercondylar space. medial and lateral condyles (226, 224) shaped to articulate with the tibial bearing component through a range of motion, in which full extension corresponds to zero degrees flexion of the knee prosthesis and positive flexion corresponds to greater than zero degrees flexion of the knee prosthesis, said medial and lateral condyles comprising inwardly facing condylar walls (238, 239) forming an intercondylar space therebetween, said intercondylar space having a medial/lateral width (ML T); and a femoral cam spanning said intercondylar space to join said medial and lateral condyles to one another, said femoral cam sized and positioned to engage the spine of the tibial bearing component in positive flexion through at least a portion of the range of motion, said femoral cam having an articular surface comprising: a central articular surface that is one of cylindrical and convex across a medial/lateral extent of said central articular surface; a convex medial transition surface flanking said central articular surface and disposed between said central articular surface and said medial condyle, the convex medial transition surface ending at and tangent to a concave medial transition surface that is adjacent to the medial condyle; and a convex lateral transition surface flanking said central articular surface and disposed between said central articular surface and said lateral condyle, the convex lateral transition surface ending at and tangent to a concave lateral transition surface that is adjacent to the lateral condyle, a central articular surface that is one of cylindrical and convex across a medial/lateral extent of said central articular surface; a convex medial transition surface flanking said central articular surface and disposed between said central articular surface and said medial condyle, the convex medial transition surface ending at and tangent to a concave medial transition surface that is adjacent to the medial condyle; and a convex lateral transition surface flanking said central articular surface and disposed between said central articular surface and said lateral condyle, the convex lateral transition surface ending at and tangent to a concave lateral transition surface that is adjacent to the lateral condyle, said central articular surface, said convex medial transition surface and said convex lateral transition surface cooperating to occupy from 80% to 91% of said medial/lateral width of said intercondylar space.