The Shimano Altus RD-M310 Rear Derailleur is the ultimate choice for seamless gear transitions and outstanding performance. Designed with precision and versatility in mind, this rear derailleur is compatible with 7 and 8-speed shifters, making it a perfect fit for a wide range of road and mountain biking setups. Featuring a 13T upper pulley and a 15T lower pulley, the Altus RD-M310 ensures smooth and efficient shifting, enhancing your overall riding experience. Its wide link design offers enhanced rigidity, providing precise and reliable gear changes, even in demanding terrains. Experience the convenience of advanced light action technology, allowing you to effortlessly navigate through your gear options with ease. The smartcage pulley plate further enhances the efficiency of this derailleur, ensuring optimal performance in every ride. With a speed compatibility of 7 and 8-speeds, the Shimano Altus RD-M310 Rear Derailleur effortlessly adapts to your preferred gear range. With a maximum tooth capacity of 34T and a minimum tooth capacity of 11T, this derailleur caters to a wide range of gear setups, offering the flexibility you need on the road or trails. Made with robust steel, the cage material ensures durability and long-lasting performance, while the sleek black color adds a touch of elegance to your bike's aesthetics. Upgrade your cycling experience with the Shimano Altus RD-M310 Rear Derailleur - your go-to solution for smooth shifting, versatility, and reliable performance on every ride. Embrace the power of precision and enjoy the freedom to explore with confidence, thanks to this high-quality rear derailleur from Shimano.