The deeply pocketed 16.5" wide driver seat sits you at the ideal cruising angle. The 13" wide passenger seat utilizes unique internal steel support wings. The driver seat is available with or without an adjustable, easily removable backrest and the passenger seat comes with a receiver for an additional passenger backrest (sold separately). The driver backrest can also be used in the passenger seat receiver. As with the very popular driver backrest option, the passenger backrest adjusts forward and back, features different height adjustments, and is easily removed without tools. The built-in driver backrest is fully adjustable, easily removable and offers more features than any other backrest on the market. Note: The passenger backrests are sold separately.