A rod reducer assembly (200) is provided and is selectively mountable to a pedicle screw assembly (100). The pedicle screw assembly includes a pedicle screw housing (120) that defines a rod-receiving recess (124). The pedicle screw assembly includes an extension assembly (140) that is coupled to the pedicle screw housing by a frangible member (132b, 134b). The rod reducer (202) is configured to reduce a spinal rod (R) into the rod-receiving recess of the pedicle screw assembly. The rod reducer assembly includes a derotation sleeve (320) configured to inhibit the frangible member from breaking while manipulating a spinal bone.
