• Generally preferred method seems to be to put it in the well of the tyre before seating it on the rim.
    Can be messy tyre if doesn’t seat well though.

    Seriously recommend removable core valves though.

    Edit: you can still put through valve, just smallish chance of gumming it up. Pumping air should help blow it through though.

  • I've always used removable cores before: I knew there was a good reason I'd chucked these in a box and forgotten about them.

    I couldn't get any through the valve and I don't fancy popping the tyre off, so I'll just get some more with a removable core.

    Thanks.

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