Epic offroad bike tours require you to bring all the essential tools and gear to keep from being stranded in the middle of nowhere. Designed to employ the unused space in your fame, MidLoader carries the heaviest items for your bike adventure. Constructed of lightweight, highly water resistant and durable materials, it mounts and removes quickly with hook and loop fasteners. Two water resistant zippered openings provide easy access to all your gear from either side. Top tube diameter 38-70mm.