Axiom's Rackrunner Fender easily installs to your rear rack with the included hardware. Axiom reduced the impact of their manufacturing and shipping methods by designing the Rackrunner to fold flat. It's also made of strong, 100% recyclable plastic. The Rackrunner fits racks with or without platforms and can be trimmed to fit. A simple and elegant 'instant fender' add-on for pannier racks. - Virtually unbreakable polypropylene body - Mounts directly to rack tubing - 100% recyclable; can be trimmed to fit any rack; ships and merchandises as a flat sheet; hardware for mounting to racks with or without platforms