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24" Frame Dimeansions?

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01 / Original post24" Frame Dimeansions?gerblefranklin · 4 Dec 2004 02 / This pagePosts 1–8Page 1 of 1 · chronological order 03 / Latest replyPost #8gerblefranklin · 5 Dec 2004

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rec.sport.unicycling
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4 December 2004
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5 December 2004
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gerblefranklin
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  1. Original post
    gerblefranklin
    Archived post
    #1

    Alright. Some may wonder why I continue myframe building projects
    despite the release of a new, great frame. I don't know why, other than
    my frames will be individual and cool. But anyways, this isn't a thread
    about that.

    I am working on drawing the plans for my muni frame right now, and I
    need to know the distance from the edge of a 40mm bearing to the center
    of a DX-32 rim. Either that dimension or the distance from the center of
    the wheel to the center of the rim. I think I can handle adding 20 mm...
    OR, the distance that the KH or other frames use for the mounts.

    Also, does anyone know the ACTUAL width of a 24" gazz? That and the
    ACTUAL radius of it. I'm not sure of these two measurements, so I need
    to know. I was thinking of 3/8" clearance on the sides and 1/2" or more
    on the top. Does anyone have any experience in this that they can
    share?

    One last thing. I have to know the diameter of the part of the magura
    brake that is clamped to the frame. There's a little split rubber waher
    thingy on each brake part, and I don't know if I want to remove tht for
    the mounting.

    Thanks,
    Bevan

    --
    gerblefranklin - Trials Unicyclist

    http://gallery.unicyclist.com/Trials-Muni

    "When we hang the capitalists they will sell us the rope we use." "It is
    enough that the people know there was an election. The people who cast
    the votes decide nothing. The people who count the votes decide
    everything." - Joseph Stalin
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  2. andrew_carter
    Archived post
    #2

    Don't have time to check now, but I have dimensions here for a couple of
    different 24" frames and the 3" Gazz. I also made a few big threads
    during my framebuilding experiences.

    I'm going to get a new frame made up for my muni soon...almost
    ideantical to my old one but with a minimum of 10mm clearance either
    side of a Gazz instead of the current 2mm on one side and 0mm on the
    other (it's a long story but it wasn't meant to be this way).

    I'll get back to you (in this thread) about those dimensions.

    Andrew

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  3. elmer
    Archived post
    #3

    I have a 24" Gazz inflated to 20 psi on a Sun Doublewide rim. It
    measures 70.5 mm in width, and the radius is almost exactly 13", meaning
    of course that it has a true 26" diameter.

    --
    elmer - uniimpaired

    "At 40 life begins...to show."
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  4. gerblefranklin
    Archived post
    #4

    Cool, thanks. That's just what I needed. That or a dial or digitap
    calipers. I'd still accept other measurements, though, since you can
    never have too many. I'm glad you gave the rim because the doublewide is
    about as wide as it'll get.

    --
    gerblefranklin - Trials Unicyclist

    http://gallery.unicyclist.com/Trials-Muni

    "When we hang the capitalists they will sell us the rope we use." "It is
    enough that the people know there was an election. The people who cast
    the votes decide nothing. The people who count the votes decide
    everything." - Joseph Stalin
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  5. andrew_carter
    Archived post
    #5

    24x3" Gazz on and Alex DX-32 rim, approx 20 psi - 71.5mm
    Radius of 24x3" Gazz, same conditions - 326mm
    Edge of 40mm bearings to inner surface of DX-32 rim - 232mm (note this
    is the linear, not angled dimension which I think is what you were
    looking for).

    As I said, I'm going for 10mm minimum clearance each side of the Gazz.
    Personally I like to have about an inch above the tyre as opposed to
    your half inch...but that's partly just an asthetics thing.

    Can you please describe the part you're asking about in your last
    question...I couldn't quite picture it.

    Unfortunately I couldn't track down the old dimensions I had for
    standard frames, sorry. Mine is one from Gary of unicycles.com.au .
    The one I'm getting made for me now (very soon at least) will be
    identical to my old (not current) muni frame with a few minor
    modifications...can't wait.

    Any other dimensions needed?

    Andrew

    --
    andrew_carter - Unicycling because it's really fun!

    HTTP://WWW.UNICYCLIST.COM/GALLERY/ANDREW
    carter.andrew (at) gmail (dot) com
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  6. rogeratunicycledotcom
    Archived post
    #6

    The KH, Onza, unicycle.com wide flange hub, unicycle.com std hub, QuAx
    hub and many of the cheaper hubs from Taiwan have a standard dimension
    of 100mm bearing centres.

    I have CAD drawings of most of these if you need them? One of the
    problems with frame design is actually the clearance between the frame
    and spokes at the bearing holder and top of the bearing holder and the
    cranks.

    Roger

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  7. andrew_carter
    Archived post
    #7


    Quoted message said:

    The KH, Onza, unicycle.com wide flange hub, unicycle.com std hub, QuAx
    hub and many of the cheaper hubs from Taiwan have a standard dimension
    of 100mm bearing centres.


    That's handy to know, thanks.

    --
    andrew_carter - Unicycling because it's really fun!

    HTTP://WWW.UNICYCLIST.COM/GALLERY/ANDREW
    carter.andrew (at) gmail (dot) com
    http://www.unicycles.com.au
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  8. gerblefranklin
    Archived post
    #8

    I'm not worrying about clearance between the cranks and frame. The frame
    will essentially flush with the bearings, and the bearing holders are
    just pressed steel, until I decide to machine some nice aluminum ones. I
    am using a profile hub and cranks (with nub, although I may get one
    without if I need to).

    Roger: I know it's off-topic, but since it's my own thread who's to
    care. The ERD of the try-all 19" rim is 365mm. Also, I wouldn't mind
    having those cad drawings, if you're willing to send them. Are they DXF?
    I'd prefer pdf, but whatever works. My e-mail is onewheeler (at) gmail
    (dot) com

    Andrew: I figured it out. The magura brake things where the pad is
    attached have a shaft where the piston is housed. That shaft looks to be
    a 7/8" shaft, and the rubber rings are there to expand it to a 1" shaft.
    I am just wondering if I need to give myself any room for adustment,
    because if I do I need to do a bit of a redesign on the frame. I am
    having so little clearance over the tire for gliding, and also because I
    want a low-profile crown for trials.

    --
    gerblefranklin - Trials Unicyclist

    http://gallery.unicyclist.com/Trials-Muni

    "When we hang the capitalists they will sell us the rope we use." "It is
    enough that the people know there was an election. The people who cast
    the votes decide nothing. The people who count the votes decide
    everything." - Joseph Stalin
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