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11 speed freehub and 10 speed cassette, spacer question

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11 speed freehub and 10 speed cassette, spacer question

Old 05-06-21, 07:23 AM
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Ev0lutionz
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11 speed freehub and 10 speed cassette, spacer question

Do I need to put in the 1mm spacer along with the 1.85mm spacer that comes with the wheelset? I find that my cassette is still tight even without the 1mm spacer.
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Old 05-06-21, 07:37 AM
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if it's tight, you can tune in the der without going to extremes, & the chainline is good with the respective crank position, I would say less is more in this situation. Save the extra shim for another wheelset.
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Old 05-06-21, 08:27 AM
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The spacer may be specific to hub/cassette combinations, and not a universal truth. For example, I have a Bontrager hub and if I use a Shimano Ultegra 10-spd cassette, I need the 1mm spacer but if I use a SRAM 1070 cassette, no spacer is needed.

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Old 05-06-21, 08:31 AM
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Originally Posted by Ev0lutionz View Post
Do I need to put in the 1mm spacer along with the 1.85mm spacer that comes with the wheelset? I find that my cassette is still tight even without the 1mm spacer.
With my Fulcrum 11-speed freehub and running a 10-speed Ultegra cassette, I require both the 11 ==> 10 spacer that came with the hub as well as the 1mm shim that came with the cassette.
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Old 05-07-21, 11:28 AM
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If it's an Shimano 105, Ultegra, or Dura-Ace cassette, yes. If the cassette was packaged with the shim, yes. I believe the new Tiagra 10-speed cassettes don't use it.
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