Ibera Bicycle PakRak Commuter MultiMount Trunk Bag with Mini Panniers Will fit most bicycle carrier racks (adaptor bracket included), including seat post-mounted and frame-mounted racks 2 built-in foldaway mini side panniers. (Can store inside pocket when not in use.) Large Compartment with Inner Mesh Pocket Trunk bag is top-mounted with a Clip-on Quick-Release System Hard Base, Reinforced, and Padded Body