97-07 HARLEY FLHTCU: Mustang 1-Piece Tripper Fastback Seat (Plain) The Tripper Fastback&trade; offers a super clean, custom style, cut low for the rider with good back support.The driver is also positioned further back "into the bike" with a full rise for all-day back support.The seat is tapered in back but still offers Rear width: 7".