geared uni?

where do i buy a geared unicycle?
wheres the cheapest price?

Schlumpf Innovations makes the only commercially available internally geared unicycle. David Stockton of LiveWire Unicycles is producing Pete Perron’s chain drive geared Coker.

what about that guy that makes like all those uniques uni’s the unicycle factory? in indiana somewhere would he make one for me?

unicycle factory would probably cost even MORE than what a schlumpf would cost, because of all the ordering and building ONE guy has to do

About 800 quid from Roger for a Schlumpf is the cheapest for one with gears inside the hub.

If you wanted a geared giraffe, you could just change the chainwheel on a normal giraffe to gear it up. A geared giraffe is the only cheap way to get a geared uni.

Joe

I think you’re link is broken, are they still in business?

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The geared unicycles in use today are almost all built with Schlumpf hubs:
https://www.schlumpf.ch/hp/schlumpf/schlumpf_engl.htm

You’re right, but as a 17 year old who can’t get a job because I look weak $3500 is a lot of money for a 1:1 + 1:1.5 ratio. So I either build it or I find a cheap alternative. I’m currently attempting a Red Menace copycat but tiny inconveniences are very prevalent, it may or may not be done by next Friday. I left a part with my local welding shop today and they can’t get to it for about 3 days. So in the meantime I want to make a 52ā€ with a pneumatic tire, I just bent the rims so now I get to make a Frankentire Saskatchewanian style

In the 2005 message to which you were replying, the 2 links were broken, so I’ve provided you the current link for schlumpf website. To my knowledge, no other gear hub has been produced in series.

Concerning schlumpf’s 1.55 ratio, it may seem low to you, but it’s a game changer. And it’s way better than a ratio > 3, which would be completely unusable on a unicycle (without electric assistance of course). Maybe I could be faster with a 1,8 ratio, but beyond that I’m not sure.

I wish you success with your constructions.

EDIT : as we mentioned in another thread, you should get a Hunirex, it costs about $200 and there are ways to have fun and improve it by modifying the rim and/or the frame. there’s a facebook group called ā€˜huni-rex’. It’s less challenging than building your own unicycle, but it can be fun and useful later on.

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Well it’s too late I already started the uni last year, and hopefully it will be done soon. My design is very similar to Red Menace, if you can find a chainring you can use it. I want to use the most extreme example possible so the current maximum set up is limited by frame size, a 1:9 ratio with 2 60T and 2 20T chainrings. I found a 120T but it’s $600 and impractical due to size

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Christoph Hartmann raced at 2016 Unicon with a fixed geared uni from his own design : 2.6 ratio with a 28" wheel

This is not the right solution from my opinion

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No matter what you do, we want photos! :stuck_out_tongue_winking_eye:

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Photos and videos will be supplied

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Any hint on what would be the right solution? Just being curious, there :smirk:

Even so, Christoph Hartmann thought he was faster with this uni than with his G36… I think it was a 26", I’m not sure.

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The limiting factor is not being able to get close to a ratio of 2 with an epicyclic gear like the schlumpf.

IMO, with a 36" wheel, the ideal ratio would be just under 2 (like 1.7 or 1.8), whereas for a 29" wheel, it would be better to have a ratio just over 2 (2.2 or 2.3). These are ratios where the hub dimensions would already be much larger.

Of course, more gears and easier shifting would also be a plus.

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With two gears, I don’t think having a much higher ratio would be a good thing, because the difference between shifted and unshifted might be too big (at least for a daily usage, maybe not for race).

And if we had the possibility of having three gears, I think that I would rather go with something like 0.7, 1, 1.6, which would allow to climb steep hills, long medium hills and go fast on flat and downhill. With a fourth gear, having a 2.1/2.2 would be really great for race, downhill and tailmand (and race)

It was 28", I had separate discussions with Christopher some years ago

Same opinion as @toutestbon except final ratio with a 29 wheel which has less inertia than a 36 wheel, over 2 sound too much I guess for a small wheel

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When I read ā€œsteep hillsā€, I can’t resist thinking of the Grand Colombier. :joy:

@bouin-bouin was also of your opinion with a first gear under 1.

I have the feeling that with a higher gear ratio, we’d get used to using longer cranks (150-160 mm) and that in most cases, that would be enough to climb any hill.
In cycling, ratios of less than 1 are rarely used, aren’t they?

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20% grades => :skull:

I think so. However, I’m not sure people would use longer cranks. I know you really like long cranks, but lots of people go for short or mildly short cranks even on geared unis. I’m not sure a higher ratio (ā‰ˆ1,7) would change that. They may start using 145 cranks, but longer would surprise me.

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