• This diagram from HED is puzzling:

    A 25mm tyre on a wide rim is taller as well as wider, despite running lower pressure?

    I suppose the pressure is implied by the larger volume, but I'm surprised tyres stretch that much.

    Flo's diagram is more what I expect. They can't both be right :s

  • They can't both be right :s

    Is one in free air while the other is under load pressing against the ground?

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