The Ergo-Luxe Short Back seat has a 2" (50mm approx), shorter back compared to the standard Ergo-Luxe seat, this greatly improves the positioning of the neck rest, making it more comfortable and ideal for shorter riders. The width remains the same as the standard Ergo-Luxe seat. If you are under 5ft 4" (162cm) tall you should choose this seat option. The Ergo-Luxe Short seat is an option on the Adventure.