Shimano Tourney TY500 6/7 Speed Rear Derailleur Shimano's Tourney long cage rear derailleur incorporates advanced Shimano functions and styling that sets the standard for entry level components. TY model comes with resin bracket and plate body for reduced weight Zinc plated adjustment screws for corrosion resistance MegaRange compatible Model: Shimano Tourney RD-TY500 Rear Derailleur Style: Road Drivetrain Speeds: 7 Chain Wrap Capacity (teeth): 43 Largest Cog: 34 Drivetrain Speeds: 6 Rear Derailleur Mount Type: Shimano Rear Direct Mount Rear Der/Shifter Compatibility: Shimano Mountain Color: Black Cage Length: Long