• One of the bikes is a belt driven cube editor. I've not had any punctures yet but had a flat tyre. Looking for the puncture it seems the air is escaping from under the rim. Any idea what caused this and how to fix?

    I've not taken the tyre off yet as was getting late, I'm wondering if it is perhaps tubeless and something is off. I've had this for over a year now

  • If that were set up tubeless, I'd expect there to be a retaining nut around the valve stem. My gut feeling is it's got a tube in it.

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