Axiom's Rearrunner Rear Fender easily installs to your seatpost with a quick-release bracket. Axiom reduced the impact of their manufacturing and shipping methods by designing the rearrunner to fold flat. It's also made of strong, 100% recyclable plastic. A minimalist rear fender compatible with 26", 650B and 29" wheel sizes - Virtually unbreakable polypropylene body - Adjustable Boa Bracket fits all seatpost/seat tube diameters - 100% recyclable; hardware included