Description: 【Effortless Internal Cable Routing】: Designed specifically for mountain bikes, this headset expander simplifies internal cable routing, eliminating concerns about handlebar movement affecting the brake lines 【Easy Installation Process】: The installation involves a straightforward six step process. 1. Install the headset, washer and stem, and loosen the stem screws. 2. Insert the base through the hole at the bottom of the front fork. 3. Put on the cover and screws, and tighten them with the base. 4. Continue to tighten the screws to ensure that the headset does not loosen. 5. Use a torque wrench to tighten the torque to 8N.m. 6. Adjust the direction deviation between the handlebar and the wheel, and tighten the stem 【Aluminum Alloy Construction】: Crafted from aluminum alloy, this headset expander offers sturdy durability while maintaining a lightweight profile for optimal bike performance 【Optimal Size for Compatibility】: With a length of 20.4 cm/8.03 inch, this expander is designed to fit seamlessly into most mountain bike setups without compromising on functionality or aesthetics 【Complete Package Included】: The product comes as a complete set ready for installation, ensuring you have everything needed to enhance your biking experience Specification: Material: Aluminum Alloy Package Includes: 1 Set Bike Headset Expander Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.