SIMPLE INSTALLATION: tool-free mounting system on seat stay and fork for quick installation. SUSTAINABLE: Made with 75% durable and strong GRS certified recycled PP material. Durable, strong and does not break. SIZE FIT: maximum tire width is 42mm. This fender size matches a 28inch wheel size. NO DAMAGE: the fenders can be mounted without damage to the frame because of the large ruber mounting surface. ADJUSTABLE: fully adjustable angle, height and length. Optional extenders included for added versatility.