I went from stock seat to HD Sundowner for 09 Super Glide Custom, stock seat I had to stop every couple hours, Sundowner I can sit for 3 to 5 hours. Butt, (pun intended), she don't like it. Rear seat so wide and flat she slides back on hard accel, forward on hard slow downs. I didn't notice any ride height difference. Monkey Butt heat during Texas summers cured by plopping a wood bead seat cover on...much Mo' Gooder!
