The BikyBag Single Pannier Shopper Bag is handy for everyday use, great for commuters and quick shopping trips, and this bag will suit everyone who needs to carry a bag with them. Equipped with quick and easy mounting clips, it can be quickly detached from the bike. The bag has one external zippered pocket, is made from water-resistant fabric, so it will stay dry during wet conditions. The bag is also convenient to carry as a handbag.The maximum diameter of the rack tube should be no more than 13 mm (0.51 Inches)