The Shimano Tourney RD-TY300-SGS Rear Derailleur 6/7 Speed delivers reliable performance for riders who demand smooth, precise shifting. Designed with SIS Rear Indexing and Double Servo technologies, it keeps your chain tracking perfectly across every cog. Its long cage accommodates a wide range of gears for versatile riding on trails or city streets | Shimano Tourney RD TY300 SGS Rear Derailleur 6/7 Speed