The Shimano SM-CS50 Outer Stopper Assembly is designed to provide secure and effective cable stops for steel and aluminum frames. Engineered for compatibility with modern STI shifters, these cable stops ensure smooth and reliable gear shifting. Optimized for Steel and Aluminum Frames: Featuring curved mounting faces, the SM-CS50 stoppers fit seamlessly onto steel or aluminum frames. Their design ensures a stable connection, minimizing cable movement for precise and consistent performance. Compatible with Down Tube Shifter Mounts: These cable stops allow the use of normal STI shifters on frames with down tube shifter mounts, making them a versatile solution for both modern and classic bike setups. Durable Construction for Longevity: Crafted from high-quality materials, the SM-CS50 assembly is built to withstand the rigors of regular use. Its robust design ensures long-lasting performance, even in challenging riding conditions. The Shimano SM-CS50 Outer Stopper Assembly is straightforward to install, providing a hassle-free upgrade or replacement for your bike’s cable routing system. Its reliable operation enhances your overall shifting experience.