• Have you got the tyre completely onto the rim? If so, it's only critical to get the beads around the valve to fit correctly, the rest of the bead will pop into place as the air goes in (I use a regular track pump to do mine, such is the tight fit). Don't put sealant in until you pumped the tyre up for the first time, or else you'll be introducing your face to the sealant when it pops into position.

    FWIW, I heat up my tyres in hot water before mounting them first time, makes them so much more manageable.

  • Yes it fit over the rim nice and easy. And the bead is sitting right around the valve too.

    Thanks, I'll drain the sealant out and try that at least! Does the inner tube trick work well?

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