Nelson-Rigg CTB-1000 RiggPaks King Roller Pack Features a telescopic handle and integrated trolley system for easy transport off your bike, with an expandable main compartment, and the included roll bag can be mounted separately When mounted to a backrest or sissybar, bag is to sit on either luggage rack or passenger seat, attaches using the unique Full-Nelson mounting system Has a fully lined interior with rigid construction to hold bags shape when empty and includes 100 percent waterproof rain cover plus a security combination lock Four large easily accessible side pockets, bottom side pockets are 2 chambered, 2 easy access front pockets for convenience Main compartment measures: 15 inch length x 9 inch width x 19 inch height Unexpanded, 15 inch length x 11 inch width x 19 inch height expanded, holds 42.04 liters/51.38 liters expanded; Roll bag measures: 13.5 inch length x 9 inch diameter; Dimensions for both bags (exterior): 15 inch length x 9 inch width x 28 inch height