Compatible with all frame materials and finishes. TETRAFENDER M1:The perfect quick-mount, dual color front fender that attaches to MTB forks with hook and loop straps easily and securely. Adjustable aluminum struts provide a closer fit to the tire and excellent mud / spray protection while the highly polished underside helps prevent dirt buildup and aids in cleaning. TETRAFENDER M2:The perfect quick-mount rear fender system attaches to MTB with hook and loop straps easily and securely. Adjustable fender length provides a closer fit to the tire and excellent mud / spray protection. Unique two-piece, dual tone design provides short or longer fender usage options for a perfect fit with your bike. A highly polished underside helps prevent dirt buildup and aids in cleaning.