Description: 【Versatile Compatibility】: This conversion axle is designed to adapt 12 mm thru axles to 9 mm fast release systems, with a length of 135 mm. It allows for seamless integration of different axle standards, making it easy to upgrade your bike frame to accommodate wheelsets 【Premium Material Construction】: Crafted from high strength alloy, this bike thru axle adapter offers great durability and lightweight performance, providing reliable support during extended rides 【Thoughtful Design for Stability】: Equipped with rubber rings on both ends, this bike thru axle hub adapter minimizes movement between the thru axle and hub after installation. This design significantly enhances the tightness and reduces noise during rides, offering a more stable cycling experience 【Additional Accessories Included】: The package includes four extra rubber rings for convenient replacements, ensuring continued optimal performance and longevity of the conversion axle system 【Compact Dimensions】: Measuring at 14.7 cm/5.79 inch in length and 1.2 cm/0.47 inch in width, this alloy hub axle converter is compact yet sturdy enough to meet your cycling needs without adding unnecessary bulk or weight to your setup Specification: Material: Alloy Size Chart: 14.7 cmx1.2 cm/5.79 inchx0.47 inch Package Includes: 1 Set Bicycle Wheel Fork Axle Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.