Convert wheels with Timken style taper bearings to eliminate wheel play. Permanent sealed double row ball bearings have a longer wear life and require no adjustment. Use with a stock 3/4" (19.05mm) axle. Bearings have an outer diameter of 1.782" (45.26mm), inner diameter of .747" (18.97mm) and a width of .81" (20.57mm). The bearing spacer length is 4 1/2" (114.3mm). Fits rear hubs on 1991 thru 1999 XL, 1984 thru 1999 FXST, 1986 thru 1999 FLST and 1991 thru 1999 FXD. Will also fit most other 1973 thru 1999 models front and rear when bearing spacer is made to size.