Lightweight, rust-resistant steering component made from stainless steel and aluminum alloy. Designed to provide fully integrated cable routing and reliable bearing support for frames with a 3.8 cm head tube. Key benefits - Durable, corrosion-resistant materials: stainless steel plus aluminum alloy deliver a lightweight part that stands up to wet and salty conditions and reduces long‑term maintenance. - Clean, protected cable routing: fully integrated cable routing keeps cables tucked inside the frame for a neater cockpit, less exposure to dirt and weather, and simpler cable management during installation. - Smooth steering action: built with bearings to support consistent rotation and dependable steering performance. - Clear compatibility: specifically requires a frame with a 3.8 cm (38 mm) head tube for correct fit. Why you need it - Eliminates exposed cabling and simplifies routing on frames designed for internal lines. - Reduces corrosion risk compared with all-steel components, extending service life. - Provides reliable bearing support so steering feels consistent and predictable over time. Practical applications - Replacing or upgrading the headset/cable-routing assembly on a bicycle frame that uses a 3.8 cm head tube. - Converting a bike to internal cable routing for a cleaner handlebar setup and reduced cable wear. - Selecting a durable option for commuter or all‑weather bikes where rust resistance and low maintenance are priorities. Technical notes - Materials: stainless steel and aluminum alloy. - Function: fully integrated cable routing. - Frame requirement: specific frame with 3.8 cm head tube. - Bearings: bearings incorporated to support steering movement.