Compatible with all frame materials and finishes. Tetrafender R1: The perfect, quick-to-install, two-tone front mudguard that easily and securely attaches to road bike forks with Velcro straps. Adjustable struts provide a better fit on the tire and excellent protection from mud/spray, while the high-gloss polished underside helps prevent dirt buildup and facilitates cleaning. The included 3M reflective stickers ensure safety at night. Tetrafender R2: Compatible with all frame materials and finishes. Tetrafender M1: The perfect, quick-to-install, two-tone front mudguard that easily and securely attaches to MTB forks with Velcro straps. Adjustable aluminum struts provide a better fit on the tire and excellent protection from mud/spray, while the high-gloss polished underside helps prevent dirt buildup and facilitates cleaning. Tetrafender M2: The perfect, quick-to-install rear mudguard system attaches easily and securely to the MTB with Velcro straps. Adjustable fender length ensures a better fit on the tire and excellent protection from mud and spray. The unique two-piece, two-tone design allows for short or longer fender options for a perfect fit on your bike. A high-gloss polished underside helps prevent dirt buildup and facilitates cleaning.