Distantiere Shimano CS-7800 Low T=1.0mm - Y1Z807000Shimano Low Spacer 1mm for 10-speed Road Cassettes The Shimano distance ring allows you to mount 10-speed cassettes on 8/9-speed freehub bodies. Product features - Shimano Y1Z807000 - Use: Road - Thickness: 1mm - Compatibility: - For a 10-speed cassette (road bike) on a 8/9/10-speed freehub - For a 10-speed cassette (road bike) on a 11-speed (road bike) freehub (1.85mm + 1mm) - Material: Steel - Weight: 2g