Abstract: A harness for mounting a non-pannier bag to a pannier mount. The harness has an upper frame member having at least one fastener for releasably attaching the upper frame body member to the mount, a lower frame body member disposed distally from the upper frame body member and configured to releasably engage with a lower frame portion of the mount. A connecting member attached between the upper frame body member and the lower frame body member. Two upper straps, each having a fixed end extending outwardly from one of the upper frame body and the connecting member, at least one of the upper straps being adjustable in length. Each of the two upper straps having a connector at a free end configured to releasably connect with one another to form a first loop. At least one lower strap attached at one end to the lower member, each at least one lower strap being adjustable in length and configured to be connectable to one of the upper frame body member and first loop so as to form a second loop.