Harley-Davidson® FXST 2006-2010 & FLSTF 2007-2017 & FLSTSB 2008-2011 Tripper™ Passenger Seat The Tripper™ Passenger Seat is 1-1/2” narrower for the passenger than our Wide Tripper™ Passenger Seat. Mustang’s advanced comfort technology has been incorporated into this totally new style of custom seat. Now you can ride low and look cool and still be comfortable at the end of the day’s ride. When matched with the Tripper™ Solo, you will then have a two-piece version of our popular DayTripper™. NOTE: Will not fit with stock solo seat.