A hinge knee system comprising: a tibial assembly having a distal end, a proximal end, and an axle component, the distal end comprising a bone facing surface for facing an end of a tibia, the proximal end having a proximally facing bearing surface, the axle component extending from the proximal end and having an axle and axle support; and a femoral assembly having a distal femoral component, the distal femoral component having first and second condylar portions and an intercondylar portion disposed therebetween, the intercondylar portion having a recess configured to receive the axle and being defined by one or more contoured surfaces that are configured to articulate with the axle when the axle is received within the recess so that the tibial assembly can be rotated relative to the femoral assembly about the axle, wherein the tibial assembly includes a baseplate component having a tray portion and a boss extending from the tray portion, and the distal end of the of the tibial assembly includes a bone facing surface of the tray portion that is configured to connect to a resected proximal tibia, wherein the axle component includes a boss slidingly received within an opening extending into the baseplate component and along the boss thereof, and wherein the tibial assembly further includes a bearing plate having a distally facing bearing surface, the bearing plate being engageable to the boss of the axle component at one of a plurality of locations along its length, the distally facing bearing surface corresponding to the proximally facing bearing surface so as to interface therewith when the bearing plate is engaged to the axle component. a tibial assembly having a distal end, a proximal end, and an axle component, the distal end comprising a bone facing surface for facing an end of a tibia, the proximal end having a proximally facing bearing surface, the axle component extending from the proximal end and having an axle and axle support; and a femoral assembly having a distal femoral component, the distal femoral component having first and second condylar portions and an intercondylar portion disposed therebetween, the intercondylar portion having a recess configured to receive the axle and being defined by one or more contoured surfaces that are configured to articulate with the axle when the axle is received within the recess so that the tibial assembly can be rotated relative to the femoral assembly about the axle, wherein the tibial assembly includes a baseplate component having a tray portion and a boss extending from the tray portion, and the distal end of the of the tibial assembly includes a bone facing surface of the tray portion that is configured to connect to a resected proximal tibia, wherein the axle component includes a boss slidingly received within an opening extending into the baseplate component and along the boss thereof, and wherein the tibial assembly further includes a bearing plate having a distally facing bearing surface, the bearing plate being engageable to the boss of the axle component at one of a plurality of locations along its length, the distally facing bearing surface corresponding to the proximally facing bearing surface so as to interface therewith when the bearing plate is engaged to the axle component.