My science teacher heard of my unicycle club, and brought in an old low quality unicycle.
But it is very difficult to adjust the seatpost, and the saddle is loose and moves side to side.
The crank screws also aren’t real crank screws.
So I’m going to try to fix it up and make it rideable for beginners.
I hate this saddle so much! I used it to set a 24-hour record (280 km) on my 26" unicycle in 1991. This saddle is just awful. Barely padded (just a bit of foam), with a steel plate underneath (ouch!). The side screw threads punctured all of my pants and left lacerations during the record ride.
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Not much you can do about having crank nuts instead of crank bolts, unless you want to get a new wheel built around a hub that uses crank bolts.
On the saddle side of things, a good option would probably just be getting a new seat post + saddle. Measure the diameter of the current seat post with some calipers and make sure to get a post of the same width. A regular Club saddle from UDC would work well enough for learning
Those threads (I think it‘s a threaded bar, not a bolt, so it’s the same on the other side) are horrible indeed!
@ManiusTerentiusPullus, if you stick to that seat, I‘d try and shorten the threads to avoid unnecessary injuries. And I‘d shim the clamp with a strip, cut out of an aluminium can, to stop the seat from rotating.
The saddle is pretty bad, I can’t tell front from back but it’s well padded.
I’ve only ridden it a little bit, but the saddle is actually soft.
Crank nuts are not a problem; the hub material matters. Usually pre-2010 Torker LXs use nuts with high quality chromoly square-taper hubs. It doesn’t look as clean as a bolt, but does the job.
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Okay, then it’s a different model. My model had a steel plate and some foam…
I still ride my 1997 freestyle wheel with such a hub with nuts on a weekly basis, also for hopping. Nothing wrong with such a hub.
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I would say that there is nothing wrong with such a design. The steel quality of this particular manufacturer is not known to me, and that might be an issue or it might not.
The main problem with the hub is that we’re missing one of the nuts, but that should come in tomorrow.
That’s confusing. According to your images, this hub does not have screws, and you cannot miss one. If you are missing a plastic dust cap, that is not a big deal.
Maybe he meant that they are missing a nut?
Nuts! Oh well, screw it!
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Nuts, screws, whatever. I’ll change my post.
On a 20" frame the first thing I add are pipe clamps so that I can rest my foot on the frame when riding one-footed:
I never had scratches or problems with the pipe clamps, I just enjoyed how much of an improvement they are for this rounded edge frame.
On a g36 I added the largest and cheapest brake I could find on amazon/ebay. All you need is to drill a 6mm hole and you have converted it to a Muni:
That brake was a life saver for emergency braking in 2nd gear. Be aware that a wet brake doesn’t work for the first 2m until it gets dry. I always feared it wouldn’t withstand the brute forces, but it survived about 5000 km.
The only problem for you to solve is where to mount the brake lever. I added a KH T-bar to my freeride or stadium saddle. As stated before, a saddle/seat post upgrade makes sence anyways.
Modern brakes are much better, but they can’t be mounted that cheap on this frame.
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I would also replace the pedals. Something with spikes. These old ones, you just slide off of and have to reposition ur feet all the time
That looks like a kangaroo. Pedals are not the first issue to take care about here.
Eh, I’d reckon the ones already on the unicycle would probably be good enough. When I was learning, I banged my shins more than a few times on the pedals. If those pedals happened to have more aggressive pins I probably would have been cut up 
For reference, these were the pedals that I learned on
What‘s wrong with a kangaroo? 
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This really isn’t a continuation of the conversation that has been going on but a tale about my $125 eBay purchase, 29 Udc trainer with a square tapered hubs. I bought this unicycle quite a few years ago when I first got back into riding. I had been riding an old 24 inch Schwinn when I came across this 29er on eBay. It came with a kris holme street saddle which was a bonus but I began slowly buying and experimenting with different cranks, tire widths , pedals, and I added a KH touring bar and a BMX rim brake . I really loved riding this unicycle and it became my main ride and gave me the the ability to ride some nice distances . I still own this unicycle even though I have upgraded my 29er experience to used nimbus 29 road I will never part with my old trainer.
Now the trainer while less expensive is not cheap junk by any means in fact I logged 2000 miles over a 4 year period with no issues and it is still in great shape today.
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