KNUCKLE ASSEMBLY

A knuckle assembly for a wheelend assembly of a vehicle is disclosed, having a spindle comprising an outboard end for receiving the wheelend assembly, an inboard end, and a spindle axis extending between the outboard end and the inboard end, and a flange portion extending radially from the spindle. A knuckle is cast about the inboard end of the spindle and may at least partially encapsulate the flange on an inboard side of the flange and an outboard side of the flange. Novel geometries for the knuckle and spindle, having different materials, are disclosed, along with a method of forming the knuckle assembly.