TOPEAK Toploader Bag Green. If youre a bikepacker you wont want to miss this. TopLoader is a large capacity top tube mounted bag giving bikepackers quick and easy access to energy bars phone wallet tools or any small essential gear they need close at hand. Capacity: 0.75L/45ci. Fits top tube diameter 35-45mm. Includes integrated rain cover. Package Contents: TOPEAK Toploader Bag