Toptube-BagThe Toptube Bag is a convenient accessory that allows you to quickly and easily access your snacks, smartphone, or other small items while cycling. The magnetic lid closure enables you to open and close the bag with one hand, so you can keep your focus on the road ahead. This bag features an innovative Tube Lock system, which makes it easy to attach and remove from the bike. The system can be directly attached to threaded eyelets on the top tube or