Shimano CS-R9200 Adhesive Ring Description: The Shimano CS-R9200 Adhesive Ring is designed to fit on the backside of the largest cog for various 12-speed Shimano gravel and road bike style cassettes. Its application on the backside of the cassette will eliminate any play between the cassette and the freehub body, ensuring better durability and crisper shifting performance. Features: Sold individually See compatibility tab for full list of compatible Shimano cassettes