The 6-speed rear derailleur Shimano Tourney RD-TY21-B-GS is the perfect choice for cyclists looking for a reliable and precise shifting system. Manufactured by the world-renowned brand Shimano, this derailleur offers exceptional performance and top-notch durability. With its 6 speeds, this derailleur allows for smooth and precise gear changes, enabling you to maintain your cadence effortlessly. Whether you're climbing a steep hill or sprinting on a flat road, this derailleur adapts easily and efficiently to your needs. The Shimano Tourney RD-TY21-B-GS is made from high-quality materials and features cutting-edge technology to ensure a long lifespan and optimal performance. It is also very easy to install and maintain, making it an ideal choice for cyclists of all skill levels. Whether you are a casual rider or an experienced cyclist, the 6-speed rear derailleur Shimano Tourney RD-TY21-B-GS is an excellent choice to enhance your cycling experience. Trust Shimano to provide you with high-quality products and outstanding performance.