SM-CS50 OUTER STOPPER

Product Information

If you're upgrading an older road bike or simply need to convert your frame's downtube shifter bosses, the Shimano SM-CS50 Outer Stopper Assembly is your solution. This clever component allows you to adapt your frame for modern integrated shifters (like STI) by providing precise cable housing stops, complete with barrel adjusters for on-the-fly tension tuning. It’s an essential piece for maintaining optimal shifting performance.

Engineered with durability in mind, these alloy stoppers come as a pair, including all necessary mounting hardware. The thoughtful design ensures a secure fit on 1-1/8" downtubes, commonly found on classic steel and titanium frames, ensuring your gear cables are routed cleanly and function flawlessly.

Features

• Converts downtube shift bosses into cable housing stops for modern shifters.
• Integrated barrel adjusters allow precise, tool-free cable tension tuning.
• Indented adjusters prevent accidental loosening during rides.
• Supplied as a pair with all required mounting bolts.

Specs

• Material: Alloy
• Downtube Compatibility: 1-1/8" (for steel and titanium frames)
• Includes: Left and right stopper, mounting bolts