Description: - 【Essential Bike Tool】: The Bike Alignment Tool is a crucial tool for maintaining your bicycle's performance. It is a rear derailleur hanger alignment gauge designed to measure and straighten misaligned derailleur hangers, solving most shifting issues. - 【Professional】: This tool is and sturdy, enhancing performance and compatibility with more frame/derailleur hanger combinations. Made from quality aluminum alloy and stainless steel, it's built to last. - 【Features】: The large inner axle strictly increases resistance tolerance, improves clearance precision, and extends the range to accommodate more frame/handlebar combinations. It also includes improvements for small clearances in through axle drive hangers and replaceable wheel threaded tips. - 【Design】: With its adjustable length design (280mm before extension, 440mm after), this tool is easy to use on various types of vehicles. Its humanized settings make it convenient for all kinds of bicycles. - 【Versatile Application】: Ideal for many speed changing variable convex ear calibrations, especially rear shifting systems, making it an essential tool for bike enthusiasts. Size Chart: 28cm/11.02inch 44cm/17.32inch Package Includes: 1 Bike Alignment Tool Note: Please allow slightly errors 1-2cm differences due to manual measurement.