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Finished my 29er

Started by underdog · · Last activity · 9 posts · 338 views

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rec.sport.unicycling
Published
20 October 2005
Last activity
22 October 2005
Original author
underdog
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  1. It took me a couple of months once I really got started to finish this
    project. I've never attached any photos before so I hope this works.
    I decided I wanted to build my own uni and thought that a 29 would be a
    good project. I haven't added up the receipts yet but I think it comes
    in at right around $300. I know I could've bought one for less but I
    wanted the fun/satisfaction of building my own. Here are the
    particulars:

    KH29 rim
    UDC wide CroMo hub
    14 ga. SS spokes

    I laced and trued the wheel myself. My first wheel build and it came
    out just fine.

    Fork crown is machined, hard-anodized aluminum
    fork tubes are 1" ID x .060" wall stainless steel tubing
    tubes are flattened on the ends in a hydraulic press and shrink fit
    into crown
    Seat post tube is same stuff as the fork tubes
    bearing holders are industrial type split collars machined to fit 40mm
    bearings
    Crank arms are Qu-Ax 125mm
    Pedals are Kona platform pedals currently w/ pins removed to spare my
    shins
    Tire is a Big Apple.
    Saddle is a Torker DX

    The ride? OK, I guess. I've never ridden anything but my 24" w/ 150
    cranks. I'm amazed at how much more torque it takes to turn the cranks
    and I'm having a really hard time freemounting the thing. I did manage
    to get around the block but it's definitely going to take some getting
    used to. Anybody have any tips for mounting a larger uni?

    +-------------------------------------------------------------------+
    |Filename: SSCN2072.JPG |
    |Download: http://www.unicyclist.com/attachment/10264 |
    +-------------------------------------------------------------------+

    --
    underdog

    'I tell you, we are here on Earth to fart around, and don't let anybody
    tell you different' - Kurt Vonnegut
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  2. How much does it weigh?

    --
    siafirede
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  3. That is one good lookin' uni! Your description of the frame making
    procedure sound very familiar :p :
    http://tinyurl.com/7au4e

    Where did you locate the crown?

    As far as mounting on a larger wheel goes, I start with the pedals at 6
    and 12 o'clock. Place one foot on the lower pedal and push off with the
    other foot to get the uni rolling. That way the other pedal has reached
    the 2-3 o'clock position as my other foot is planted on it, giving
    optimum leverage to get things moving.

    Great job😄

    --
    Krashin'Kenny

    If you ain't crashing, you ain't going fast enough!!!!!!!!!!!
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  4. paul royle said:

    Don't try and use a roll back mount. Use a static mount, or if you're
    feeling adventurous try a rolling mount, it looks very cool if you can
    wheel the uni along and get on without breaking step - it almost never
    happens like that though...

    for unis with big wheels (and torque problems) I found the rolling
    mount worth the try.
    for sure I usually miss the first 3/4 tries but afterwards I may mount
    even when people are watching (my usual nightmare 🙁 )
    on the 29er since I do not need much speed to start I put my foot on
    the pedal in the proper position , then I walk back and start
    forward again ... thus I am less stressed to get the proper foot
    position and usually do not need to perform a funny break. the 2 paces
    thrust is sufficient.

    --
    wobbling bear

    One Wheel : bear necessity
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  5. Thanks for the mounting tips. I'll try some them. I did get to ride a
    bit more yesterday and actually nailed a small percentage of static
    mounts. Once I got rolling, man, does this thing ride nice. It's very
    smooth and it just wants to roll. Bumps and dips in the road are much
    less noticable than on my 24. The shorter crank arms (compared to what
    I'm used to) are much less forgiving to little hesitation and errors.
    It'll force me to become much smoother. Practice, practice.

    I tallied up the receipts this morning and I've got right at $260 in
    it. Not bad, huh?

    To answer a few of your questions;

    It weighs in at 14 lbs. on the shipping scale here at work, which I
    assume to be fairly accurate.

    I was a machinist in a past life and I still have access to the machine
    shop here at work so I came in on the weekends and machined the fork
    crown out of a block of aluminum and then sent it to an anodizing shop
    in Phoenix. I also bored out the bearing holders on a lathe and also
    cut the radii in the bottom of the fork tubes for the bearing holders
    to seat into. I'm not much of a welder though so I had a friend of
    mine, who is a certified welder, attach the bearing holders uisng a TIG
    welder. I had a setup on the milling machine that allowed me to get
    the fork lengths to within a thousandth of an inch and I bored the
    holes in the crown to exactly the same depth so that when I seated the
    fork tubes in and clamped the bearing holders on very tightly,
    everything would be square and perpendicular. IOW no misalignment of
    the wheel upon assembly.

    --
    underdog

    'I tell you, we are here on Earth to fart around, and don't let anybody
    tell you different' - Kurt Vonnegut
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  6. Man, that uni looks sweet!!
    I love homeade rides, and I appreciate the effort and energy and
    originality no matter what the cost.
    It was well worth it, Im sure!!
    Im kinda jealous actually. 😉

    --
    babyivan
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  7. Actually (don't tell anyone round here but...) I use a rollback mount
    and quite successfully too now. I have a 29er with 125 cranks.

    Cathy

    --
    cathwood

    Run to the bedroom in the suitcase on the left you'll find my favourite
    axe;
    Don't look so frightened this is just a passing phase, one of my bad
    days - Pink Floyd.

    http://www.chuckingandtwirling.co.uk
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  8. I don't know why the rollback mount is getting dissed around here. It's
    my favorite mount. It creates a nice separation between the mounting
    and the riding. You can wait until after you've mounted before deciding
    whether to go backwards or forwards. And it feels real cool to mount
    into a stillstand and just hang there for a few seconds before doing
    anything.

    --
    dogfeathersvt
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  9. After a few days of riding this now under my belt, I'm starting to get
    it down pretty well. I seem to be able to do a static mount or a
    rollback mount with relative ease. I'm still amazed at how much
    pressure it takes on the pedal to keep the thing from rolling forward
    though. Especially when I remember back to when I was first learning
    to freemount on my 24. I had to learn to use such a light pressure on
    that one. I still can't seem to visualize what a rolling mount would
    look like on a larger wheel. I've seen videos of people doing this on
    a 20" but never on a 29 or 36. Does anyone know of any video of this?

    --
    underdog

    'I tell you, we are here on Earth to fart around, and don't let anybody
    tell you different' - Kurt Vonnegut
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