For 8" spacing on Kuhn Krause discs with DS209-TT4 or DS209-TTR4 bearing and 1-1/2" rd. axles; 9-1/8" spacing on discs with FD209RB or BRG35 bearing and 1-1/2" rd. axles; 9-1/8" spacing on Landsman 6150, TL6200, TL6400; Landstar 6300 series soil finishers.