Abstract: A bike bag includes a first storage compartment including a first rigid outer surface, the first storage compartment configured to be selectively closable. The bike bag further includes a second storage compartment including a second rigid outer surface, the second storage compartment separated from the first storage compartment by a divider. The second storage compartment is also configured to be selectively closable independently of the first storage compartment. The bike bag further includes an attachment system. The attachment system includes a first attachment member disposed at a first side of the bike bag and a second attachment member disposed at a second side of the bike bag (adjacent to the first side of the bike bag). The bike bag is selectively couplable, using the first attachment member and the second attachment member, to at least a top tube or a saddle of a bike.