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The Shimano Outer Casing 300mm Black SIS is a high-quality shift cable housing segment designed to keep your gear changes smooth, precise, and reliable. Built for use with Shimano SIS indexed shifting systems, this outer casing helps maintain consistent cable tension and crisp shifting performance on a wide range of bikes, from everyday commuters to performance road and mountain bikes. The 300 mm length is ideal for short housing runs, such as rear derailleur sections, internal routing exits, or fine-tuning cockpit cable layouts where a clean, compact piece of housing is needed.
Featuring a durable outer layer and a carefully engineered internal structure, this Shimano housing resists compression and friction, helping to reduce cable drag and extend the life of your shifting components. The black finish blends seamlessly with most bike designs, giving a neat, professional look to your cable routing. Whether you are refreshing a worn-out drivetrain, building up a new frame, or just tidying your existing setup, the Shimano Outer Casing 300mm Black SIS is a dependable choice for restoring sharp, accurate shifting performance.
