AL 7-89-08023 Bumper Wheel for Nilfisk Clarke American Lincoln Floor Scrubbers. This is a solid 3" diameter bumper wheel. This wheel is mounted parallel to the floor on the side and rear squeegee weldment. The purpose of the wheel is to allow the squeegee frame to ride against the wall. Not to be confused with the roller wheel (commonly CL 59971A) which contacts the floor. Fit models: Clarke Encore Max Rider, EncoreR Max, American Lincoln SR 5730, Nilfisk Alto Encore R, and others. Please refer to your parts manual for the proper application. Replaces Nilfisk Alto Clarke American Lincoln 7-89-08023. Our Part Number AL 7-89-08023