The Shimano 10-Speed Road Cassette Spacer is versatile. It can be used to mount 10-speed cassettes on 8/9-speed freehub bodies. It can also be used to mount a 10-speed cassette on an 11-speed freehub (1.85mm + 1mm) 1.85mm spacer not included. It is a quality steel part. Key Features: - Steel - 2g Weight- Usage: - 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) 1.85mm spacer not included

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