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Thread: 20 x 1 3/8th?

  1. #1
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    20 x 1 3/8th?

    Can anyone tell me how this size wheel eventuated? Was is a product of the engineering process? Of steel export duties? And why when the Raleigh 20 frame went to USA, did they equip with a 20inch wheel?

    My reasons for asking are that the feel of that wheel under a 6' 3" 90KG man is light and responsive.

    The BMX for the middle ages?

    It's such a natural size - is it like the Golden Section for Clasical architects?

  2. #2
    jur
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    I am speculating that the US R20 was equipped with tyres that were commercially available in the US at the time.

    Tyre sizes are pretty chaotic. See sheldonbrown.com/tire-sizing.html

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    No. I am talking about a natural (see Gravity) size wheel. I ask you, why don't cars have 26inch, 29 inch wheels? The Fiat Uno has a wheel the same size as the R20 Folder!

    Racing cars, Formula 1, they have 20 x 1 3/8ths wheels.

  4. #4
    coprolite fietsbob's Avatar
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    Projecting a Guess >>> There were a lot of 3 speed bikes EA3 26" is that wide,
    smaller Brompton wheels are that wide, so why not thought the genii at Raleigh, a 20" too

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