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trial rim size?

Started by october · · Last activity · 7 posts · 259 views

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01 / Original posttrial rim size?october · 17 Jul 2006 02 / This pagePosts 1–7Page 1 of 1 · chronological order 03 / Latest replyPost #7kington99 · 18 Jul 2006

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Original section
rec.sport.unicycling
Published
17 July 2006
Last activity
18 July 2006
Original author
october
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7
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Public discussion
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Frame sizing

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  1. Original post
    october
    Archived post
    #1

    just a question about the rim/tire size on trials...

    they're advertized on UDC as a 20" trials, but then it says the
    rim/tire size is 19"?

    most say they come with a maxxis creepy crawler 19x2.5

    but on maxxis.com they only offer the creepy crawler in a 20x2.5

    so which is it?

    20" or 19"?

    thanks!

    october

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  2. onetrack
    Archived post
    #2

    the size of the wheel is measured by the outside of the tire for some
    weird reason. the mod bike "trials" wheels use a slightly smaller rim
    which is still called a 20" because of the massive tire used. the
    technical size is 20 but most people call it a 19 so you won't be
    confused as to why you can't get your bmx tire on it.

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  3. october
    Archived post
    #3

    so,

    basically, you couldnt put a creepy crawler on a 20" rim, or a 20" tire
    on a 19" rim?

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  4. onetrack
    Archived post
    #4

    yep

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  5. trials_uni
    Archived post
    #5

    Yeah...Any tire that says 20x2.5 will most likely only fit a 19" rim and
    regular tires wont fit the 19" rim

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    trials_uni

    TRIALS 4 LIFE !

    Quoted message said:

    <>UNICYCLING FOR MYSLELF<><


    'Check Out The Newbie Guide' (http://tinyurl.com/99yez)

    harper said:

    Bruce-
    Quick. Put me on e-Bay.

    w00t...i got reply # 60666 in MR
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  6. october
    Archived post
    #6

    thanks!
    i was wondering about that... just kind of weird...

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  7. kington99
    Archived post
    #7

    Yeah it's a pain, especially as tyres like the Onza sticky fingers come
    in both 20" and 19" sizes.

    As far as i understand it, when they started making huge tyres they
    would no longer fit in BMX frames, and they didnt want to change the
    frames because they were exspensive, so they invented slightly smaller
    rims to allow huge tyres to be used without the outside diametre much
    exceeding that of a normal 20".

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