I saw in your “My Unicycles” list it’s a “24” cheap unicycle with a yida tire". I’m going to take a guess that it’s one of those no-name unicycles that flood the listings of Amazon, eBay, Temu, etc.
As a proud owner of my very own, *ahem*
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Ringmaster 16 Inch Wheel Unicycle...
…Adjustable Height Unicycle Bike, Training Balance One Wheel Bike Cycling Unicycles for Adults Kids, Daily Fitness Exercise, Cycling, Balance Training (Yellow)
It’s not exactly something I would trust with a century ride. Poor welds, flimsy frame, who-knows-what grade of metal, questionable wheel quality, etc. Like how bikes from big box stores are more often described as “bike shaped objects”, the no-name unicycles from big online retailers are more like “unicycle shaped objects”. Except those unicycles are possibly worse than BSOs… However, it might survive a century if you give it a once-over and throw some parts at it:
- Swap the Yida tire for… Literally anything else would be better probably if it’s like the one on the 16" I have. Ideally opt for something with less knobs, a rounder profile, and a sturdier compound. While you’re changing the tire, take a peek at the rim tape. Be absolutely sure that it’s on correctly! It’s probably a single-wall rim so you don’t want the spoke heads to puncture your tube in the middle of your ride. Get better rim tape if you can.
- Is your seat post the correct height? You don’t want to go for a really long ride with your saddle too low. If you can’t raise your saddle high enough because the post is too short, measure it with some vernier calipers if you have them. Unicycle.com should have some longer posts you can get.
- If you do need to get a longer seat post, double check the bolt pattern for the saddle on the unicycle. Does the bolt pattern look like the left or right post?
If the saddle mount looks like the one on the right, then you may need a new saddle as well (which bolts into the pattern on the left). I don’t have any specific recommendations for which saddle to get, but I’ll add it might be beneficial to buy a long saddle handle that could provide some upper-body support.
- Shorter cranks are highly recommended. Cotterless cranks are pretty cheap so I’d say buy a couple sets and get a feel for them. Note that running shorter cranks will push your ideal saddle height upwards, so if you run into any issues with saddle height, read above.
- And, of course, bring spares and tools. Make sure everything is properly fastened on the unicycle too. Don’t over-tighten the bearing caps.
Now being that there’s a pretty tight time crunch between now and that ride you have planned, riding a 36er might not work out. I do highly recommend having a 36er, though in my experience it will absolutely take some time to get used to. You’ll see it described as a bit of a “beast” in reviews, and it’s not an exaggeration. Even after learning on a 26" wheel it felt like a big jump in size
Even if you got it today, once the event rolls around you might only just be comfortable on the 36er. That is assuming you’ve learned how to get on it relatively unassisted.
That’s another thing… I absolutely recommend you learn how to freemount. Even if you can only successfully mount a unicycle some of the time, it will be so much better than having to walk and find something to hold on to in order to mount. On your 24" wheel you’ll more than likely be able to freemount just fine if you practice it a little during your sessions. Freemounting a 36er on the other hand is an art itself, especially with shorter cranks. Something you’ll be proficient at in 3 months time? Maybe, but not a guarantee.
I think a good “middle ground” option is to get a 26" or a 29" with short cranks. It’ll be easier to learn how to mount and ride given the time constraints, and you won’t be spending as much money. Now I’ll still root for having a 36er because IMO it’s an awesome uni to master, but that’s something that can probably wait until after the event. Of course if you wish to challenge yourself to learn to ride a 36er in a few months for the event, I’d say go for it. Just be prepared to put in a lot of saddle time getting used to it.