The Reverse Components Cassette Lockring are compatible with Shimano/SRAM cassettes up to 11 speeds. These cassette lockrings hold your cassette securely while adding a pop of color to your bike. Features: These cassette lockrings hold your cassette securely while adding a pop of color to your bike Compatible with Shimano/SRAM cassettes from 8 to 11 speeds Available in a variety of colors to match your bike Specifications: Compatibility: 8-11 Speed Shimano/SRAM Max Low Cog: 11T Material: Aluminum Color: Black Weight: 6g