Microshift R9 9-Speed Cassette 11-28T 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. Continuously molded cogs are straighter than stamped steel, resulting in more consistent, predictable shifting performance Steel lock ring Precision ramps and chamfers for rapid chain movement Nickel plated Compatible with SRAM and Shimano 9 speed systems