Feature:1. The main body is made of aluminum alloy to ensure lightweight. The pull rod of the expansion lock cylinder is made of high quality carbon steel. The accuracy thread is not easy to fall out and has a better stability.2. The screw of the headset cover is made of stainless steel, T6 heat treatment guarantees the overall hardness, CNC knurling process guarantees the strength.3. Expansion body pawl lock block uses 3 pawls, larger than the ordinary 1 section/2 section, the force area is larger, the fit is better, and the lock block is longer, and the greater the force area, the greater the stability.4. Easy installation and disassemble, reusable, clear texture, and close to the front fork; use a No. 6 hex wrench to tighten the pull rod, and the ratchet teeth are spread out and closely fit with the inner wall of the front fork.5. Mainly used on carbon fiber and mountain suspension forks. General front forks can also be used. It can protect the front fork from damage and ensure the safe use of carbon fiber and mountain suspension forks.How to Use:Installation:1. Put the expansion lifting core into the upper tube of the front fork;2. Tighten the pull rod clockwise with a 6mm hex wrench to lock the lifting core;3. Install the stem on the front fork pipe diameter, with the edge of the lifting core slightly lower than the edge of the stem.Specification:Item Type: Bicycle Front Fork Expansion CoreMaterial: Aluminum Alloy Body + Carbon Steel Lock CoreExpanded Body Length: Approx. 40mm / 1.6inExpansion Range: Approx. 22.2-25.4mm / 0.9-1in