A dynamic balancer, comprising an outer housing; a spindle assembly rotatably mounted to said outer housing and having a spindle shaft and characterized by: a frameless motor assembly comprising a stator coupled to said outer housing and a rotor rotatably received within said stator and connected to said spindle shaft; a chucking assembly receiving a locking member, said locking member adapted to capture a tire therebetween, said chucking assembly and said locking member captured in said spindle assembly and rotated by said frameless motor assembly; and an upper rim from which axially extends said locking member which comprises a locking shaft having a plurality of shaft teeth (64 A-D); said chucking assembly having: a lower rim having an inner flange with a shaft opening therethrough adapted to receive said locking shaft, said lower rim having at least one tee cavity, a wedge jaw adapted to be radially moveable in a corresponding one of said at least one tee cavities, said wedge jaw having one side with a plurality of jaw teeth, wherein said jaw teeth are adapted to mesh with said plurality of shaft teeth (64 A-D) and to hold said locking shaft in place so as to rotate with said spindle assembly, a wedge sleeve adapted to be slidable engageable with an opposite side of said wedge jaw, wherein axial movement of said wedge sleeve moves said wedge jaw into and out of engagement with the locking shaft. an outer housing; a spindle assembly rotatably mounted to said outer housing and having a spindle shaft and characterized by: a frameless motor assembly comprising a stator coupled to said outer housing and a rotor rotatably received within said stator and connected to said spindle shaft; a chucking assembly receiving a locking member, said locking member adapted to capture a tire therebetween, said chucking assembly and said locking member captured in said spindle assembly and rotated by said frameless motor assembly; and an upper rim from which axially extends said locking member which comprises a locking shaft having a plurality of shaft teeth (64 A-D); a frameless motor assembly comprising a stator coupled to said outer housing and a rotor rotatably received within said stator and connected to said spindle shaft; a chucking assembly receiving a locking member, said locking member adapted to capture a tire therebetween, said chucking assembly and said locking member captured in said spindle assembly and rotated by said frameless motor assembly; and an upper rim from which axially extends said locking member which comprises a locking shaft having a plurality of shaft teeth (64 A-D); a lower rim having an inner flange with a shaft opening therethrough adapted to receive said locking shaft, said lower rim having at least one tee cavity, a wedge jaw adapted to be radially moveable in a corresponding one of said at least one tee cavities, said wedge jaw having one side with a plurality of jaw teeth, wherein said jaw teeth are adapted to mesh with said plurality of shaft teeth (64 A-D) and to hold said locking shaft in place so as to rotate with said spindle assembly, a wedge sleeve adapted to be slidable engageable with an opposite side of said wedge jaw, wherein axial movement of said wedge sleeve moves said wedge jaw into and out of engagement with the locking shaft.