• As a complete neophyte I have a question about this point in the first post:

    If when you install the tyres they don't pop into place with a track pump often the best thing to do is put an extra layer of rim tape on

    I assumed this is because it increases the effective diameter of the rim bed, therefore closing the gap for air to escape. Now I have a roll of tape to potentially beef up my pre-taped rims, I realise 1 layer is only going to increase the diameter by under 0.3 mm. Which doesn't seem significant.

    Or does 'put an extra layer of tape on' mean 5 layers?

    (I'm at the point where I've successfully mounted one tyre fine with a CO2 inflator, track pump having failed, but the other - same tyre and same rim - seems nowhere near mounting)

  • Which doesn't seem significant

    It might not seem significant, but it is. The Mavic UST spec calls for a bead seat diameter tolerance of ±0.35mm

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