I’m 5 foot 2’’ and I got a 24’’ wheel. I had to cut down the seatpost until the seat wouldn’t go any lower because the seat hit the clamp. a 26er is probably too big for you considering you’re two inches shorter than me. I would say go for the 24’’ but I would have to know your inseam. also, what kind of riding are you going to be doing? if muni I would suggest looking into a dx. good luck.
I really want this for some short distance and light muni. Is the 24" a big step up in terms of speed from a 20? I am still leaning a bit towards the 26, plus it is cheaper. But I really have no experience.
The required seatpost height is not determined by your height. It is determined by the wheel diameter, crank length, crown height, and, as you mentioned, your inseam, not height. The shorter person may be the one with the longer legs. The cranks under consideration may be a full inch shorter than yours. The crown and seatpost tube might be shorter on the unicycle he is considering. I have seen small nine year olds riding Cokers. If their legs are long enough and the cranks are short enough it’s going to work.
You are not going to go so fast on a 26" wheel that you’re going to get hurt unless you’re trying to go full sprint speed all the time. You’re probably going to be able to run out the fall. If you are proficient with a 24" wheel the incremental change to a 26" is not that great. If you want a 26" wheel, go for it.
The 26" has 170 cranks. The 24" has 125 cranks. The speed difference will be almost unnoticable between the two because one has a larger wheel and longer cranks, while one has a smaller wheel with shorter cranks. That being said, because your 5’, the smaller wheel with shorter cranks will probably fit you better.
I woke up this morning, got on my 24’’ and rode 12 miles with nothing but a wedgie when I got home. It’s surprising how efficient a unicycle can be compared to running or something. with the 24’’ you will have no problems whatsoever in terms of getting tired.
Alright, so it sounds like the 24 would be better for me. Now comes the hard part: waiting until Hanukah starts to get it…that would be waiting until December 16th… oh well, I guess I can ride my 20" a few miles if I have to.
Keep in mind that neither of your listed unicycles has a tire that is intended for “off-road” use. If your idea of “light muni” is just riding across a yard or something relatively flat, you should be okay.