Nano PanniersDescription When you need the cargo capacity that a rack provides, but need something that wont get in your way when the going gets rowdy, Nano Panniers are the ticket. At only 4" wide the load stays tight to the bike on singletrack and will not get in your way on those nasty hike a bikes. An external compression system keeps the bag snug at various load levels. The devil is in the details on our rack attachment system. Although simple in concept, the