Features: Accurately measure spoke lengths and adjust hubs for 13 inch bike wheel with this strong steel gauges, ensuring precise wheel building and best ridings performances. Crafted from strong strength steel, this 34cm gauges resists corrosion and serves multiple functions, including wheel truing and hub centering for smooth maintenance. designs for bike repair man , cycling enthusiasts, and DIYers search professional tool to assemble or repair wheel with confidence. Use it in homes workshops, bike shops, or outdoor track to quickly check spoke tension, eliminate wheel wobble, and maintain top cycling efficiency. Its marking and small design enable easy portability while delivering accuracy for wheel building tool and bike maintenance essential. Specifications: Material: Steel Size: about 3.2x37cm/1.26x14.57inch Package Includes: 1 steel spoke measuring rulers note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.