[Compatibility] Compatible with Shimano HG Series, suitable for mountain and road bikes, offering versatility for various cycling terrains and preferences. [Material] Made of steel material, corrosion-resistant, durable material ensures prolonged performance, providing a reliable gear solution for extended cycling endeavors. [High Precision] The inner thread is finished with high precision, which ensure close connection with the bike hub and smooth operation. [10 Speed 11T] With a 11-tooth count, inner diameter of 32mm, and outer diameter of 45mm, it optimizes cycling efficiency, ensuring smooth gear transitions. / [11 Speed 13T] With a 13-tooth count, inner diameter of 34.5mm, and outer diameter of 54mm, it optimizes cycling efficiency, ensuring smoot.