TOPEAK Midloader Black 4.5l 63005010. 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. Capacity: 3L or 4.5L Specifications for TOPEAK Midloader Bag: Manufacturer: TOPEAK Capacity: 4.5 liters Package Contents: TOPEAK Midloader Bag The TOPEAK Midloader Bag is a quality addition to the TOPEAK lineup. For more great deals on Cycle by TOPEAK please browse our TOPEAK Cycle page.