So yeah, I always hear about geared 29ers… what about geared 36ers… do they exist ? if soo where can I buy one ?
I think if you wanted one you would have to find a geared hub that would fit/work on a 36er… I would like one as well… but I don’t have the money for one yet…
If you ask nicely maybe they could make you a custom 36" version of the Schlumpf Geared Unicycle. Other than that. I wouldn’t have a clue. Unless you know someone who make you one.
Hoped this helped somehow
Dave Stockton and I made a geared Coker (I think the first) with one of my hubs for Kris Holm. It’s being passed around among several riders until Kris has room for it in his new digs. I believe Florian makes a frame for a 36" to fit his hubs. Mike Scalisi owns a geared Coker made from one of my hubs that Steve Howard modified. Pete Perron has made a few renditions of his jackshaft design in gear ratios of (approximately) 1.2, 1.6, and 1.9. Pete’s design is the most flexible, I believe, in that there are many gear ratios that may be chosen from. His limitation is that it is fixed gear and the cogs must be changed to alter the ratio so no shifting during a ride. Pete’s design may be available through Dave Stockton’s Live Wire Unicycles.
Thanks haper. So how fast are they ? Also you got any idea of how much livewire would charge me ?
Who currently has Der Uber Coker? I tried it once in NYC and loved it. I’d love another go on it!
Alright, so you have to change the gears manually ? so When you want to change gears you have to stop? corect me if I am wrong… Also… no price is up on the website anyone got an idea of how much it should be ?
I had an opportunity to ride that amazing beast in 2005.
I wrote about it here (if anyone cares to read a very mediocre rider’s experiences with a geared Coker).
maxcarriere, Greg’s Coker is a one-speed (fast). You don’t shift it. I don’t know anything about other geared Cokers, though.
It’s actually shiftable in its present configuration. It requires removing a bolt and then inserting it in a different spot with a spacer. As far as I know, Ryan Atkins has it right now.
And, by the way, Dave Lowell is der Uber rider of der Uber Coker.
I think they’re about as fast as you ride them. I think they would charge you about what they cost.
Cost for a Outta Phaze style geared Coker is probably going to be expensive. If you have to ask how much it is going to be you probably can’t afford it.
I don’t know if U-Turn has had any interest in the geared Outta Phaze yet. Costs would likely include the design time necessary to get it designed and then there’s custom machining that needs to be done to make the hub. U-Turn has the rights to the basic design but I don’t know if he has a specific design already engineered.
If you do ask him, make sure you’re sitting down and ready for a wallop. At worst then you’ll end up pleasantly surprised if it comes in under your expectations.
A very cool unicycle though. I predict that an Outta Phaze will ultimately end up owning the hour record and the 100 mile record.
Course with the gearing ratio possibilities with the Outta Phaze design you could make it with a 29er wheel rather than the Coker wheel. Just gear it up more. You’ll end up with a lighter wheel. Might be better that way for speed and endurance records.
Re: geared 36er
On Mar 2, 3:58 pm, john_childs
> maxcarriere wrote:
> > Alright, so you have to change the gears manually ? so When you want to
> > change gears you have to stop? corect me if I am wrong… Also… no
> > price is up on the website anyone got an idea of how much it should be
> > ?
> Cost for a Outta Phaze style geared Coker is probably going to be
> expensive. If you have to ask how much it is going to be you probably
> can’t afford it.
> I don’t know if U-Turn has had any interest in the geared Outta Phaze
> yet. Costs would likely include the design time necessary to get it
> designed and then there’s custom machining that needs to be done to
> make the hub. U-Turn has the rights to the basic design but I don’t
> know if he has a specific design already engineered.
> If you do ask him, make sure you’re sitting down and ready for a
> wallop. At worst then you’ll end up pleasantly surprised if it comes
> in under your expectations.
> A very cool unicycle though. I predict that an Outta Phaze will
> ultimately end up owning the hour record and the 100 mile record.
> Course with the gearing ratio possibilities with the Outta Phaze design
> you could make it with a 29er wheel rather than the Coker wheel. Just
> gear it up more. You’ll end up with a lighter wheel. Might be better
> that way for speed and endurance records.
> john_childs (att) hotmail (dott) com
> Team Never Wash Your Muni
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> View this thread:http://www.unicyclist.com/thread/58509
Hans Fiby rode a geared (1 / 1.5 ratios) 36"er on the SINZ unitour.
It was a Schlumpf hub (are there any others?) which he bought together
with the frame and had fitted up. It was pretty quick.
You can get schlumpf geared 36ers, loosemoose has one. Basically you buy the hub cranks and frame from schlumpf, then buy a rim, spokes, tyre, seat etc. and stick the lot together. Expect to pay in excess of £1k ($2k) for it though. I’ve ridden it quite a lot and it’s a good setup, albeit tricky to change gears at speed.
Yes, the Schlumpf hub in a Coker wheel would be the other option.
The two styles of geared unicycles we currently have are the Schlumpf style hub and the Outta Phaze style jackshaft gearing.
I was talking about the Outta Phaze style that LiveWire Unicycles (U-Turn) can make. Of course U-Turn could also make a geared Coker using the Schlumpf hub too.
Some info on the Outta Phaze design are here:
Yes. The originals. Franks Bonsch’s (Unifrank) and mine.
Greg, why is the axle so wide? I don’t really have any experience with geared unicycles, I rode a 36" geared for a minute or two at Unicon and it was quite disapointing… saying that the unicycle had 125mm or 140mm cranks on which didn’t get me more speed than 80mm or 90mm, a 36" with short cranks would probably ride better. Maybe Greg can answer this question, why are all the gear ratio’s so small? Myself I would be going for a smaller wheel and a heavier gear ratio instead of a big wheel with a ‘small’ ratio like 1.5 is it because above 1.5/1.6 is mechanically impossible or is there a longer train of thoughts behind it?
The first pass making the geared hub, I wanted enough taper on the axle to make sure I could get any cranks on it. I was unfamiliar with making the tapers. It increased the “Q” substantially and when I made the first hardened axle upgrade I shortened it to match the CroMoly axle profiles.
The limit of the simple planetary hub gear ratio in this mode (fixed sun, driven planets, hub connected ring) is 2. The 2 is actually unattainable because it requires infinitesmally small planet gears. The ratio goes as
where sun is the number of teeth in the sun gear and ring is the number of teeth in the ring gear. The sun/ring ratio is limited by
where planet is the number of teeth in a planet gear. Higher gear ratios require going to a compound gearing system. This adds quite a bit of weight and complexity.
I personally think that the larger and heavier the wheel is the more stable the ride is. I have ridden light 24" up through Coker wheels in 1.5 mode and found that stability increases with diameter and weight or, better, stability increases with wheel inertia.
Here’s a picture of me on the Schlumpf 36" I rode in the Marathon at Unicon last summer. I don’t know the status of being able to order one of these directly, the story on this particular one, etc. It belongs to Roger Davies.
The nice thing about it is you can cruise along at a nice clip without having to pedal so fast. The downside is you have to pay a lot more attention to keep it balanced. I was not able to ride at (or near) the speed of the front group in the race. Due to my lack of conditioning for such a long race however, I think I got a better time on that cycle than I would have on an ungeared Coker. Maybe. My experiences in that race are described in great detail in some similar threads.
Will any square taper crank arm fit the geared Schlumpf?