Can anyone measure the width of the clamp (the dimension parallel to the bar) of the new XT M8100 12 speed Shimano brake levers?

I want to know the amount of 'bar space' the clamp takes up.

The width of either the XTR M9100 or SLX M7100 levers would be fine as well.

  • Do you mean the XT8100 groupset ? Shimano's specs are at bike.shimano.com/en-EU/product/component/deore-xt-m8100/… but it doesn't give a bar diameter, just "Compatible Shifting Lever Mount: Clamp band, I-SPEC EV" and "Clamp Band Type: Open clamp"
    – Criggie
    Jan 16, 2020 at 8:02
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    Wouldn’t this just be the standard MTB bar diameter - 22.3mm? Jan 16, 2020 at 13:57
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    @ArgentiApparatus I'm not talking about the clamping diameter (that's obviously the handlebar grip diameter), I'm talking about the width (the measurement parallel to the bar) of the lever's clamp. In essence, it's the amount of 'bar space' the clamp takes up. Jan 16, 2020 at 14:01
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    The dimension you are looking for is not obvious from the wording if your question Jan 16, 2020 at 14:04
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    I edited to make your question clear Jan 16, 2020 at 16:04

1 Answer 1


Here you go, the Shimano XT 12s brake lever. It's roughly 17mm

enter image description here

  • 1
    Thank you. Much appreciated. Jun 23, 2020 at 17:56

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