• Finally got it to work after adding another layer - had thought tape that was on would be ok as it had had a tyre on before with no issue, but the second layer helped.

    Also think that the valve core wasn't helping as the protrusion into the rim was pushing the tyres out - have switched to a narrower based valve with more joy.

    And tried schwalbe g one speed instead of formula IRC rbcc.

    Basically changed the whole lot and it worked....

  • With IRC tyres because they are generally smaller for ther size than others apply enough tape so the tyre for is tight. Then with soapy water they inflate easily.

    Bigger tyres tend to I flare without needing to be as tight a fit. IRC tokens can inflate while being an easy hand fit.

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