geared uni enthusiasts, i need your help!

I know nothing about them but im saying no. How would it even work.
Theres no where to atach cranks or anything. It could work for the
wheel of a giraffe but thats about it.

--
timbob1907

forrestunifreak said:

I'm addicted to placebo's. I should stop taking them, but it wouldn't
matter anyway.

fluxusmaximus said:

It looks like some deranged mad-man going berserk with a heavy metal
object.

(\_/)
O 0
(><😉This is bunny. Copy bunny into your signature, help him on his way
to world domination.
'CarbonFibreSeat!'
(http://www.unicyclist.com/forums/showthread.php?t=56125)
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I understand that all the pre-schlumpf hubs were adapted from bike hubs,
but it took hundreds of hours of precision machining to sort them for
unis. If it were easily doable then schlumpf wouldn't bother making
unicycle specific ones.

EDIT: And infact they weren't on the fly shiftable.

--
kington99

Dave

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abbabibble said:

Sturmy Archer AW 3-speed english hub.
Can this be made into a shiftable fixed hub for a unicycle?

Someone had a giraffe at the 1995 (IIRC) BJC with a SA 3-speed hub.
Unfortunately I didn't get to ride it and, although I believe it was
fixed, I'm not certain.

The same machine was also featured in (again IIRC) The Catch around the
same time (could have been Kaskade). All my old juggling magazines are
in the loft, but I'll try to pop up there and take a look at the
weekend. I doubt I'll find anything particularly helpful, although I
/will/ be able to find the names of the guys who built it.

I'm pretty sure I've seen, somewhere, instructions for converting a
3-speed hub gear into a 2-speed fixed. I'm afraid I can't remember
where, though.

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It might be possible to convert it to a 2-speed fixed hub then use it in
a giraffe.

http://www.sheldonbrown.com/awfixed.html

http://www.users.globalnet.co.uk/~hadland/fairbrothersa.htm
According to this article, the high-gear is 1 to 1 and there is a good
amount of backlash.

Still, it would be an interesting project.

--
mscalisi

Quoted message said:

<> Unicycle for (reducing the) Buddha <><

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Possible if you use a setup like purple faze.

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Evan Byrne
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abbabibble said:

Sturmy Archer AW 3-speed english hub.
Can this be made into a shiftable fixed hub for a unicycle?

If so describe how, because i can get a rediculously good deal on one
locally.

I'm not sure whether this is a special version of the sturmey archer
hub, but at least in England, you can often pick up Sturmey Archer 3
speed hubs for about 20 pounds, with a free bike attached. Or maybe for
not much at all if you go to the dump / look in skips.

Joe

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Save your money. If it was even remotely easy to do, they'd already be
on the market. Take a girl out for ice cream instead.

--
tomblackwood

Tailgate at your own risk...
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Ditto. Many before have contemplated this with the S-A, and while some
have done the fixie conversion, that hub has too much lash to be
suitable. And there's the issue of attaching cranks to the axle in
conflict with the shifting cable, which was solved so eloquently by Mr.
Schlumpf's design.

--
unisk8r
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Danny Colyer said:

I'm pretty sure I've seen, somewhere, instructions for converting a
3-speed hub gear into a 2-speed fixed. I'm afraid I can't remember
where, though.

A unique little bike shop in Seattle called 'The Bikesmith'
(http://www.thebikesmith.com/) did two speed conversions of a
Sturmey-Archer hub into a two speed fixed gear hub. Sadly that shop is
out of business now. But he may still possibly make the hubs on the
side. I just don't know how to get in touch with him now. I'm also
not sure of what model of S-A hub he did the conversion with.

The two speed fixed gear system worked well for bikes. It is, however,
not strong enough to work on a unicycle. A unicycle has too much
torque. The gears inside the hub are not strong enough to handle the
torque that unicyclists put on their hubs. It's not even suitable for
a giraffe.

What compounds the problem is that unicyclists gear the unicycle too
low. Hubs like that need to have bike style gearing ranges. If you
gear them too low you can put too much torque on the hub and break the
gears. So hubs like that come with specs that tell you the minimum
size front chainring and maximum size rear cog that you can use so that
you don't overpower the hub and break it. Unicycles, unfortunately,
are way out of spec for that.

Putting such a two speed fixed gear hub on a bike would be cool. I
just got a single speed road bike and if I get to liking the fixed gear
option I just might consider getting one of those two speed shiftable
fixed gear hubs.

--
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Danny Colyer said:

Someone had a giraffe at the 1995 (IIRC) BJC with a SA 3-speed hub.
Unfortunately I didn't get to ride it and, although I believe it was
fixed, I'm not certain.

It was a 3 speed fixed hub. A sturmey archer 'ASC'. They are very
collectable in two wheeled cycling so if you see one, buy it. That
giraffe had about 1/4 of a pedal revolution of play when you changed
gear which was a little sketchy.

--
nickjb

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Wednesdays, 8:30. All welcome
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interesting thread. I had this conversation with my dad in the pub a
couple of weeks back. he was convinced it could be done. Looks like it
is, but maybe not worth it...

Quoted message said:

1/4 of a pedal revolution of play when you changed gear

:eek:

--
lowlight
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nickjb said:

It was a 3 speed fixed hub. A sturmey archer 'ASC'. They are very
collectable in two wheeled cycling so if you see one, buy it. That
giraffe had about 1/4 of a pedal revolution of play when you changed
gear which was a little sketchy.

Thanks Nick. I couldn't get to the mags in the loft, I believe they're
behind a hefty pile of baby clothes and toys that I'm trying to get DW
to dispose of and that I CBA to move.

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First thing to check out. Can you peddle the hub backwards with it
engaged?? If you can't then it has a free wheel and you'll have to
get rid of that. Next is there a reaction arm? Do you have to hold
the threaded "axle" inmobile for the gears to work?? I'm betting you
will have to hold the axle still So........... Your cranks would have
to go on the sproket or the "shaft" the sproket turns and your frame
needs to be attached firmly to the threaded axle. I don't think you can
do that because the cranks will be attached to the sproket and will run
into the frame legs. Kind of confusing.... take a look though and I
think you will see the threaded axle needs to hold firmly to the
bicycle frame. You'll see how it works if you look at it and fiddle
with it a bit.

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Qweld

Flats blow
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