Stainless steel drilled brake disc fits FL front/rear 1972-early 1978, FX rear 1973-early 1978, FX, Sportster front 1973 with single disc brake, 10 inch O.D., 2 inch I.D.Stainless steel drilled brake disc fits FL front/rear 1972-early 1978, FX rear 1973-early 1978, FX, Sportster front 1973 with single disc brake, 10 inch O.D., 2 inch I.D. OEM# 41813-79