• Once the tyre is seated you then need to disconnect the hose. Hopefully the bead will remain in place. Now reinstall the valve core and pump up as normal.

  • My experience so far is that if all the air escapes, the tyre deforms under the loss of pressure and the seal fails. I usually end up pushing about 110 psi in, so that there's still a chance some air will still be present once I get the core back in. Just wondered if I was missing something, no biggie.

    Also, why do I always end up bending my Presta cores (the bit you undo to get air in)? Am I not supposed to fully undo them?

  • Just wondered if I was missing something

    You may be missing the bead retaining lip (arrowed in the drawing). It's in the UST standard, but seems to have gone astray in a great many so-called "tubeless ready" rims.

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