The Shimano 10Speed Road Cassette Spacer is versatile It can be used to mount 10speed cassettes on 89speed freehub bodies It can also be used to mount a 10speed cassette on an 11speed freehub 185mm 1mm 185mm spacer not included It is a quality steel part Key Features Steel 2g Weight Usage For a 10speed cassette road bike on a 8910speed freehub For a 10speed cassette road bike on a 11speed road bike freehub 185mm 1mm 185mm spacer not included

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