Upgrade your cycling experience with the Shimano Tourney RD-TY300 Rear Derailleur. Designed for the serious cyclist, it features a HYPERGLIDE cassette for fast, responsive indexed shifting. The double servo-panta mechanism ensures the derailleur moves in an optimal path, perfectly tracking each shift for the most accurate SIS shifting. The SIS Rear Index Shifting System, which includes the index mechanism, frictionless shifting cable, and smooth action rear derailleur, delivers an unparalleled riding experience. Whether you're tackling steep inclines or navigating challenging terrains, this derailleur will keep your bike performing at its peak. Enjoy precision control and enhanced performance with the Shimano Tourney RD-TY300 Rear Derailleur.