Upgrade your mountain biking experience with the QHQKR Mountain Bike Cassette. Made from high-strength steel with a nickel chrome coating, this cassette offers a perfect balance of strength and weight. Its hollow design ensures lightness for smooth rides. The cassette features a high-precision HG female thread for secure hub connection, providing ease of maintenance. With a special tooth profile and taper, gear shifting is fast and precise, guaranteeing smooth and accurate indexing. Compatible with Shimano and Sram transmission systems, this cassette is a versatile choice for riders seeking quality and performance. Receive a bonus rear hook extension and installation tool with your purchase.