I found a seat from a 2008 Ultra that I am curious will fit a 2010. I am of the understanding that the new frame came out in 2009. Most seats fit either up to 2007 and then from 2009 on is a different part number due to the frame redesign. Will the 2008 model year design seat only fit the 2008? Or 2008 thru current?
I just gave a 2012 Ultra seat to a friend to go on his 2008 RoadKing. It fit fine. Harley parts catalog specifies that most of the seats are for 2008 and later bikes.
When they came out with the new "low" seat for the Ultra in, I believe, 2010 I tried to put one on my '08 and it would not fit. Perhaps I could have forced it, but it would not go down in back far enough to get the rear screw in.