Harley Davidson motorcycles with ABS brakes (2008 -current) require one ABS bearing per wheel and one non ABS bearing per wheel

2000-2001 touring models utilize 3/4" rear wheel bearings

2000-2007 touring models utilize 1" front wheel bearings.

2002-2007 touring models utilize 1" rear wheel bearings

2008+ touring models utilize 25mm bearings front and rear.  If you have ABS brakes 1 ABS bearing per wheel is required.  2014+ touring models with bigger than stock front wheels require an ABS compensating bearing for the size wheel you are running (21+)as opposed to a standard ABS bearing.  The rear wheel uses a standard ABS bearing.

2000-2006 Softails utilize 3/4" bearings front and rear

2007 Softail's utilize 25mm front bearings and 3/4" rear bearings

2008 + Softails's utilize 25mm bearings front and rear except the Cross Bones.  The Cross Bones is 3/4" front and 25mm rear bearings.  For 2015+ softails with ABS brakes and a larger than stock front wheel the ABS compensating bearing is required.  

2000-2003 Dyna's utilize 3/4" bearings front and rear

2004-2005 Dyna's utilize 1" front bearings and 3/4" rear bearings

2006-2007 Dyna's utilize 1" bearings front and rear

2008 + Dyna's utilize 25mm bearings front and rear.  If you have ABS brakes 1 ABS bearing per wheel.  For 2016+ FXDLS with ABS and a larger front wheel an ABS compensating bearing is required in the front wheel.