• Should have a 1mm spacer assuming it's a 9/10 speed hub.

    9/10 speed freehub:

    9 speed cassette, no spacer
    10 speed cassette, 1mm spacer

    9/10/11 speed freehub:

    9 speed cassette, 1.8mm spacer
    10 speed cassette, 2.8mm spacer
    11 speed cassette, no spacer

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