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Tube Size vs. Tire Size

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01 / Original postTube Size vs. Tire Sizedonna · 24 Jul 2005 02 / This pagePosts 1–8Page 1 of 1 · chronological order 03 / Latest replyPost #8donna · 24 Jul 2005

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rec.sport.unicycling
Published
24 July 2005
Last activity
24 July 2005
Original author
donna
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8
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Frame sizing

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  1. Original post
    donna
    Archived post
    #1

    I just put a 24 x 3 Gazz tire on my Torker DX. I used the orginal stock
    tube that is 24 x 2.125 -- much smaller than my new tire. I have only
    played around a little in my driveway so far and like the air pressure
    at about 16 psi which is the bottom of range suggested on the
    sidewall.

    Since I'm using a smaller tube, do I need to use higher pressure to take
    up extra space inside the bigger tire? Do I have an increased risk of
    the tire coming off the rim if I go out on the trails?

    BTW -- for those who have asked in prior threads about the clearance and
    received mixed answers -- I bought my DX about 4 or 5 months ago and
    there is 1/8 in clearance on each side of the Gazz and about 1/4 in
    clearance at the top. As currently mounted, the tire measures 25 7/8 in
    diameter.

    I would appreciate any help you can offer.

    Thanks,
    Donna

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  2. Krashin'Kenny
    Archived post
    #2

    Donna.
    Chances are you shouldn't have a problem using the smaller tube in the
    Gazz. When I was still racing motorcycles offroad, we would use a 4.50
    tube in a 5.10 tire at around 12 psi. without any problems. I've also
    used 1.5 tubes with 2.3 tires on my mtb. The Gazz has a pretty beefy
    sidewall and should hold up well at 15 psi.
    I run only 18 psi in my Gazz and weigh about 185 🙂

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  3. ColDawG
    Archived post
    #3

    if you do sidehops, either flat, or especially inclined, your tire will
    most likely fold over because the rim is a lot skinnier than it should
    be for that tire width

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  4. andrew_carter
    Archived post
    #4

    I used a 24 x 1.5-1.75" tube in my 3" Gazz for about a year no worries.
    Over that time there wasn't a single flat. Maybe I've just ahd bad luck
    with the 3" tubes, but in my experience the tube size has made no
    difference. A smaller tube is cheaper and lighter.

    Andrew

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  5. cyberpunk
    Archived post
    #5

    Are you using the stock rim too? Because if you are thats crazy you got
    it to fit. Maybe I see a creepy crawler in the future of my 20" DX

    And if not where did you find a wide 48 spoke rim?

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  6. byza_dog
    Archived post
    #6

    Are you going to put a creepy crawler on your torker 20" will it
    fit? and you will need a 19" rim.

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  7. Krashin'Kenny
    Archived post
    #7
    ColDawG said:

    *if you do sidehops, either flat, or especially inclined, your tire
    will most likely fold over because the rim is a lot skinnier than it
    should be for that tire width *

    The Gazz will work O.K. on the narrower rim. It is better to run a wider
    rim, but I had a 3.0 Arrow tire on a narrow rim on my "loaner" Muni and
    never had any problems with it folding😉

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  8. donna
    Archived post
    #8

    As for the rim -- Yes, I am using the rim that came with the DX. The
    sidewall of the Gazz says the minimum rim width is 28mm. I think this
    DX rim is exactly the minimum 28 mm, if I measure the outside of the
    rim. I don't know if this measurement is supposed to be the inside
    width or the outside width of the rim.

    As for the 20 in Torker --

    I looked at the Creepy Crawler, but the 20 in is only 2 in wide. Which
    is not as wide as the 19 x 2.5 Creepy Crawler. So, I didn't think it
    would be as good. Agree or Disagree?

    I can't really find a good wide tire alternative for my Torker 20.
    Since I'm not really interested in doing trials, but want to use my 20
    to learn new skills, I would rather upgrade the Torker 20 tire than buy
    a real trials uni.

    I have been looking through the books at my LBS and found a tire named
    "Flame" that comes in a 20 x 3 size. It's not the Kenda Flame. I think
    it was called Pyramid, but I'm not sure. The LBS is going to try to
    order it tomorrow. If anyone is interested, I'll let you know what they
    say.

    --
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