Microshift R9 9-Speed Cassette 11-25T SilverH92 9 speed cassettes are nickel plated for durability, and constructed using the same processes as microSHIFT's higher end cassettes, resulting in rapid, responsive shifting at an affordable price. Nickel plated Continuously molded cogs are straighter than stamped steel, resulting in more consistent, predictable shifting performance Precision ramps and chamfers for rapid chain movement Compatible with SRAM and Shimano 9 speed systems Steel lock ring