Fits front and rear on Big Twins 73-99, front on Sportsters 73-99 and rear on Sportsters 79-99. Also fits swingarm pivot on Big Twin 4-speeds 58-86. Replaces Harley nos. 9033 and 9052. Bearing no. LM11949 and race no. LM11910. Overall size: 3/4 I.D., 1-25/32 O.D., 21/32 wide. This tapered bearing and race set also fits on many snowmobiles and trailers.