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trials tire folding help

Started by markf · · Last activity · 17 posts · 549 views

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rec.sport.unicycling
Published
22 June 2005
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7 July 2005
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markf
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  1. i can't seem to stop folding my tire on my new 20" trials uni. enough of
    a side hop to take stairs two at a time makes it fold. i've tried
    pressures from 20 psi up to 45 psi. i'm running an alex dx rim, luna
    trials tire, and a standard bmx 20 X 1.75 or so tube. i remember hearing
    that a bigger/thicker tube would help a lot, but i can't seem to track
    one down. any advice/help/suggestions/what do you do?

    ps i'm 6'4 180lbs or so, not sure if that would make much of a
    difference, but i figure better mention it.

    --
    markf - movie nerd

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  2. folding????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

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    halfbike - Obsessed Rider

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  3. halfbike said:

    *folding????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
    *

    folding = the tire squishes too far on a sidehop, which like throws you
    off so you're kind of on the edge of the rim, which could be bad at
    times.

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  4. Yeah, I heard that a thicker trials like tube helps the folding, but a
    thinner tube has a better prehop....

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    caw89 - Cody

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  5. soundz like you need even more air pressure or find a Moped tube.

    or

    go to a shop and look at the tubes 1.75 is skinny, at least get a 2.215

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    jagur - Random Unicyclist

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  6. More air pressure fo sho, or dont land at so much of a parallel angle to
    the ground when you sidehop.

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    Catboy - I enjoy the taste of dirt!!!

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  7. it's not landing. it's on take off. i lean a little to one side, push
    down and go. the push makes the tire fold, and really messes with my
    hop. i'm running at close to the max pressure and it still does it. my
    LBS has no fatter tubes. i guess i'll have to find a trials website or a
    moped tube or something. thanks though.

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  8. Darren Bedford has a 20x3.0 intertube for sale. I've never tried it but
    that sounds ideal. www.bedfordunicycles.com I am using a 20x2.125 tube
    which works ok, I have to inflate it to around 30 PSI to eleminate fold
    over for side hop (static lean and jump, no prehop = 62" long jump) I
    would think it's your tube. Have you checked walmart for a kids bicycle
    tube (20x1.95-2.125)?

    --
    UNIquelyCanadian - 8~)[==)--O

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  9. Oh yeah, I had that the other day when I was hopping around on this
    little play structure at park. I was hopping with crappy style. Then
    pumped up my tire and was hopping with....... Cool style....

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  10. Unicycle.com sells a 20 inch by 2.15 tube, that works for most people,
    you cant use bedfords 20 by 3 inch because a trials is only 2.5 inchs
    wide. Go to genaric tubes and select that size

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  11. lancerfan119 said:

    *Unicycle.com sells a 20 inch by 2.15 tube, that works for most
    people, you cant use bedfords 20 by 3 inch because a trials is only
    2.5 inchs wide. Go to genaric tubes and select that size *

    Have you checked Darren and been told the 20x3.0 would not fit? A
    non-inflated tube is way smaller then the listed size, from what I can
    tell, a "3.0" tube should fit a trials uni; I was planning to try out
    that beefer tube when I have to change my tire.

    Does anyone know the stated diameter of a moped tube; I’d assume its
    larger then 3.0”?

    ...I don't mean my post as an attack; I'm interested to know the answer.
    🙂

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  12. well, there's a conti modep tube that's 20x2.5 and a maxxis trials tire,
    also 20x2.5. i haven't checked wal-mart, mostly because i keep
    forgetting...anyway, thanks for the help and i'll let you know how it
    comes out once i find a better tube.

    --
    markf - movie nerd

    stuck in iowa and unemployed.
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  13. The moped tube should solve your problems, I've personally ridden one.

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  14. u could just pump up the tube or if its too small then do what everyone
    else is sayin and get a fatter tube

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    Schmidty563 - fearless unicyclist

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  15. ^
    |
    |
    |

    Haha, what he said....perfect and to the point!

    --
    caw89 - Cody

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  16. Schmidty563 said:

    *u could just pump up the tube or if its too small then do what
    everyone else is sayin and get a fatter tube *

    um, i did part 1, and i'm asking if part 2 is actually my problem, and
    it seems that it is, so now i gotta find a bigger tube. i just got back
    from wal-mart and they sell a 20x4.25 tube. that's waaay too fat. loks
    like moped tube it is.

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  17. im sorry, UNIquelyCanadian, yes i was refering to the 2.125 inch tube,
    my mistake, I was off by less then a millimeter

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