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The Shimano Inner Cage Plate GS is a genuine replacement part designed specifically for Shimano rear derailleurs that use a GS (medium) cage. As the inner half of the derailleur cage assembly, this plate plays a crucial role in guiding the chain smoothly across the cassette, helping to maintain crisp, reliable shifting under load. Using an original Shimano cage plate ensures precise fitment, consistent performance, and compatibility with the derailleur’s existing pulleys, hardware, and spring mechanism.
This inner cage plate is ideal for riders refurbishing a worn or damaged derailleur, or mechanics who want to restore shifting performance without replacing the entire unit. By renewing the cage, you can improve chain retention, reduce noise, and extend the life of your drivetrain. Whether you ride on the road, gravel, or trails, a correctly aligned and intact inner cage plate helps keep shifts accurate and reduces the risk of dropped chains. Pair it with fresh jockey wheels and a clean chain for a noticeable upgrade in overall drivetrain feel.
