homemade muni frame

come on now,give us the side shot so we can see the fork rake.how is it
riding with that?

--
jagur - #3649_all fluff i hear?

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-Forget_Your_Life-

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I like it very much. It will get you noticed in the unicycle world!

--
elmer - uniimpaired

"At 40 life begins...to show."
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Another very nice uni. How long does it take to make one of those?
Would you ever think about making them for others?

Daniel

--
daino149 - How's it going, Texas?

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Sig count: 2

04.05.19 11088
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04.05.23 11214
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There's no fork "rake" in terms of an angle. The seattube is parallel
with the legs. The only factor with this crown was that the seattube is
slightly behind the lateral centerline of the legs. But that has no
effect on rideability.

On the heliarced freestyle crown, the seattube is centered with the
legs, as it was cut up to all match. This particular muni crown is
untouched from how I got it out of the parts bin! It usually takes a
few visits to find a useable crown. Some of the bike fork crowns are
too wide even for a 3" tire!

Yes, I'd consider modifying frames for others, but I'd like a few more
tries to gain some experience. You can definitely feel the difference.

--
unisk8r - All this for just cross-training?
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How much did it cost? How much does it weigh? And which bike shop sells
used forks? I also live near Redmond, WA and want to build myself a
MUni.

--
mazem
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That is one fine looking uni. I have been thinking about making one out
of an old fork crown myself. My only suggestion would be to drill a
SMALL hole where the sterrer tube/ seat tube is pressed into the crown
and installing a rolled pin or small bolt to ensure that it doesn't come
loose and suddenly stop the tire. Being as most crown assemblies use a
press fit with a shoulder on the bottom designed to keep the tube from
PULLING out through the top crown only, there is nothing to keep it
from being PUSHED out through the bottom of the crown

--
Krashin'Kenny - Crash Tested

If you ain't crashing, you ain't going fast enough!!!!!!!!!!!

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mazem said:

*How much did it cost? How much does it weigh? And which bike shop
sells used forks? I also live near Redmond, WA and want to build
myself a MUni. *

'Recycled Cycles' (http://www.recycledcycles.com/) in Seattle sells used
forks, used stems, used cranks, used anything from a bicycle. I bought
the stem and bar ends and other misc. parts for my Coker handle at
Recycled Cycles. It's a candy store of used parts. They also sell
Torker unicycles.

'Bike Works' (http://www.bikeworks.org/) way at the other end of
Seattle, also has a big supply of used parts like forks and stems and
bars and such.

--
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Nice frame, is the stearer tube aluminum or steel? Manatou suspension
forks dont have fork rake at the stem it's down at the wheel, I'm not
sure if the tubes are a press fit or have a clamp probably older ones
have a clamp and newer ones are press fit.

--
Tellurider - Dan Wilson
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Great job!!! that frame looks really nice, is it light? i really want a
frame like that for my trials, and my hopefully not to distant Muni

--
tom_edmonds - Finally...less talking, more riding

"rest and elevation" we know its all we'll be told, so why do we still
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Yes mazem, I bought the parts at Recycled Cycles at the base of the
U-District on Boat Street.

The steerer tube is high-quality aluminum. I have found several crowns
that use this tube, it fits a 25.4mm seatpost, and is 28.6mm OD, the
same as my freestyle crown seat tube. I've seen lots of crowns with
pressed-in steel steerer tubes, but those weigh alot and really wouldn't
save overall weight.

I now have some carbon fiber seat tubes in my possession, but the
biggest issue is how to make a main-cap bearing holder that can fit into
the ID end of a 1.0" OD tube.

I believe we will be following bike technology, and we'll be seeing more
carbon fiber frames in years to come. Doesn't a carbon-fiber trials
frame make perfectly good sense? Why heft steel??

--
unisk8r - All this for just cross-training?
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unisk8r said:

*I believe we will be following bike technology, and we'll be seeing
more carbon fiber frames in years to come. Doesn't a carbon-fiber
trials frame make perfectly good sense? Why heft steel?? *

You heft steel because it's durable. You can bang it up, scratch it up,
dent it up, grind it up, and the frame will still be fine. One wrong
scratch on a carbon fiber tube and the frame is shot. We won't be
seeing any carbon fiber trials frames or carbon fiber muni frames for
freeride style riding. Carbon fiber is the wrong material for a
unicycle frame that's going to get banged up. You don't see any carbon
fiber frames on freeride bikes or trials bikes. Aluminum frames have
potential, but I don't see carbon fiber happening. I'm still a bit
leary of the aluminum muni and trials frames. They haven't proven
themselves yet. Steel is still the way to go for durability.

I can see carbon fiber frames for a XC 29er. A 29er designed for the
style of riding at a 24 hour race or some other racing event. I can
also see a carbon fiber frame for a Coker. But I cannot see carbon
fiber being used for freeride style muni or for trials.

Even the carbon fiber seat bases have a limited life span when used for
aggressive muni and for trials. Carbon fiber is nice, but isn't the
most durable material.

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I will have to check out Recycled Cycles then. Sounds like a great place
to get parts.

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mazem - Department of Redundancy Dept.
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OK, thanks for the reality check John. But what about the magic of
titanium? That might be able to withstand some scrapes, no?

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unisk8r - All this for just cross-training?
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theres been some development in magnesiu frames in the biking world more
recently i think, beacuse you can make the tubing thicker beacuse of its
weight or something like that.

--
tom_edmonds - Finally...less talking, more riding

"rest and elevation" we know its all we'll be told, so why do we still
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unisk8r said:

*OK, thanks for the reality check John. But what about the magic of
titanium? That might be able to withstand some scrapes, no? *

Titanium will work. It's expensive for bike frames, but unicycle frames
don't have as much material and the tube shapes and butting don't have
to be as exotic.

'Creative Gecko's' (http://www.creativegeckos.com/pages/uni-home1.htm)
used titanium for munis. He used titanium for flex and suspension due
to its potential infinite fatigue life. He wanted flex in the frame.
Titanium can even be superior to steel in its ability to take abuse from
crashes. It's just expensive stuff and requires special welding in an
inert atmosphere. The bearing holders for a titanium frame are probably
going to be the most challenging part of designing a titanium frame.

And you don't have to paint a titanium frame. Think of all the weight
you're saving by leaving off the paint. 🙂

--
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Awwww.... no CF trials frames....

A guy at the LBS i work at is learning how to make CF frames, so i told
him he could make me a uni frame for practice. it's going to be
interesting. I figure i might as well just trash it! I think it will be
fun.

anyways, I'll have to tell you all how it goes, and keep experimenting,
just because JC says it's not a good idea, doesn't mean you shouldn't
try it(allthough he's allmost certainly correct). That's how our sport
has to be pushed.

-Ryan

--
m_extreme_uni

"Yeah, Gravity is bad" Leo Kottke
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john_childs said:

*
You don't see any carbon fiber frames on freeride bikes or trials
bikes. *

<http://www.lahar.co.nz/> make downhill bikes out of carbon fiber, which
seem to survive. I met someone with the softtail version who was using
it as pretty much a freeride bike including dropping into the big quarry
near where I ride which is really scary massive. If it had lasted for
him for several years, then I suspect the big downhill one could put up
with pretty much anyone's riding.

Joe

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m_extreme_uni said:

*Awwww.... no CF trials frames....

A guy at the LBS i work at is learning how to make CF frames, so i
told him he could make me a uni frame for practice. it's going to be
interesting. I figure i might as well just trash it! I think it will
be fun.

anyways, I'll have to tell you all how it goes, and keep
experimenting, just because JC says it's not a good idea, doesn't mean
you shouldn't try it(allthough he's allmost certainly correct). That's
how our sport has to be pushed.

-Ryan *

Just thought I'd bring this back to the top.
Any news on this Ryan I'm interested in seeing how it would hold up
because carbon fiber is alot lighter right? So you should be able to hop
a fair bit higher.

Also how much do you suggest a titanium trials frame would cost JC?

--
Robbie - Spoons Taste Good

And how is education supposed to make me feel smarter? Besides, every
time I learn something new, it pushes some old stuff out of my brain.
Remember when I took that home winemaking course, and I forgot how to
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Robbie: Alright, since I'm currently researching this anyways, I'll give
you an idea of the cost of an all-titanium trials frame. Figure about
$28USD per foot of titanium tubing. Now, figure about three feet of
tubing involved. There's about $84USD already. Now, since high-quality
end-mills can run about $50 a piece, think you'll need about two fo them
alone to make the bearing holders, so that's $184USD. Now, fictor in the
cost of the welding and gas, and you add another $20 at the bare
minimum, more like $50. So, the baseline cost would be somewhere around
$200. Then, factor in the markup of someone who put all this labor in,
and you'd be lucky if it were as little as $250. But, since noone's
about to go mass-producing titanium trials frames, they're all custom
jobs. This means that if they make more than one, they're most likely
just to give it away to a friend or just someone they think will like it
and use it. So basically, the cost is nothing to the recipient, except
having friends who know how to obtain and machine and weld titanium, and
being good enough that you need a titanium trials frame. Unless your to
the point where you lift the uni large amounts during hops, you won't
see that much benefit from the titanium frame, other than bragging
rights.

--
gerblefranklin - Trials Unicyclist

Don't you think it's a cruel irony that acting like a G.I. Joe in the
army can get you a Medal, while playing with one can get you thrown
out?

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