I am 5’1" with an inseam of 28" so thats why I am limited to a 20". The lowest of a 24" is about 28" so you would be OK. I think most people here agree that a 20" is easier to learn on unless you are like 6’ tall. I will let others comment as I’m a newbie just working on getting good enough to uni to work and back for now. :D:D:D:D I think the fat tire is nice as it rolls easily over rocks and twigs and all. I have a skinny tire for now. Anything is good to start on. You could look for a 20" torker used to start on and resell it later when you know what you want to do and need.
Depends on, how you define “older” 
Certainly not. I’m 51 an begun 2½ years ago.
Well, I’m right here - in Denmark 
but I don’t feel “older” - only kind of mid-age!
Go for it. It’s fun.
Good luck,
Sanne
What offence?
Anyway. I have several Nimbi (Nimbuses ?). They are very nice unicycles. I learnt on a 20". I don’t do anything very exciting, mostly distance riding and a bit of hockey when I can.
If you can do it, then you’re not too old. Sounds like you’re making good progress. It took me many weeks of practice to get that far!
Never let anyone tell you what you can and can’t do, everyone is unique. If you believe in yourself then you can do whatever you like.
Not many older women here, but indeed there are some. If you played for a couple of hours and already can go straight down the street, that’s fast learning!
Why would you be too old to get into this? Not at all! Younger people jump more than us older ones, although Terry (mentioned in one of the responses above) is an avid jumper.
After some more practice, you could climb the same trails on a unicycle that you now do on a mountainbike. For best results on rough and slippery terrain you need a fat knobbly tire. For climbing I would recommend 24 x 3", and 150 or 165 mm cranks. 20" wheels are somewhat easier to learn on, but apparently you passed that initial stage already. And 20" is not a very good size for MUni (Mountain Unicycling), it’s too small and gets too easily stuck in uneven terrain.
If you’re not ‘aggressive’, you probably could get away with a cotterless hub (as opposed to splined), but that depends also on your weight. Splined hubs are generally stronger.
You’re doing great so far:)
If you want to get into Muni, I’d suggest a 24"X3" w/ 150 cranks (anything longer would prob. be too much unless you’re really tall, like 5’10" +). For mild to moderate Muni some prefer a 29" wheel.
Check out the 45+ yr. old thread. There’s also a women’s thread, but I couldn’t find it:o (I bet Cathy knows where it is).
Thanks for all the replies. I think I’m going to go with the Nimbus II 24 inch with the 145mm crank arm. Before I make the order does anyone have other suggestions about crank arm length or seat options or anything?
I did a post on seats for women. Most the women seem to prefer the Nimbus gel so youre OK there. Or the KH freeride.
Where do you live? If you live by me I would ride and practice with you!! 
I have the Nimbus with 125 mm cranks. I like the combination for riding on the street, and the hookworm tire is great.
I would suggest getting the 145 cranks to learn on and consider switching to 145 cranks after you get used to it (if you are mainly riding on streets). If you get into Muni the 145 cranks should be fine. You will need a knobby tire for Muni, but do not worry about it now.
I’m in “sunny?” California. Drenched by rain but still in a drought. Where is Gaithersburg? Is it East coast?
Oh BUMMER! I am always looking for a female friend to do sports with. I only luck out at the skatepark with girls on skateboards, rarely, but usually they arent out of high school yet. I’m the oldest female skater here! But its east coast. We just got a bunch of snow too but hopefully it will be gone by weekend.
that’s a great uni to start, however if you think you will want to take it offroad, the nimbus 24 inch Muni would be a better option. it will cost you 45 dollars more, but you will get a stronger rim, and stronger cranks. you can still put a street tire on this uni, and it won’t require as many upgrades as you progress
+1
Also the rim is wider, riducing fold-over on large side hops, and creates a flatter profile increasing stability in loose dirt or mud, and comes w/ Magura brake mounts. + the Nimbus II only holds up to a 2.6" tire.
If you are seriously considering doing Muni I’d go this route.
Thanks for the suggestion and link. I went with that one. Now I just have to wait!
“Kills it”? Lol, is that good or bad?
When I first read it I thought the context might have been something like, “whenever there’s a good vibe going and he walks into the room, he kills it”. 
In this case I hope it was meant as a good thing. 
D:)
Pardon me if you’re just being silly , and you already understand this. But killing it is a good thing. It’s like you’re dominating it, if that makes sense.
No generally here in NY and in the music scene and such , kills it refers to doing something really well.
I like your riding and dedication a lot, I could take or leave the narrations though 
haha, no, I just was curious about the context, but I get what you’re saying so thanks!
Thanks. Yeah any “narration” I do is mostly for little fun bits, like the IHOP parody video. I do like to include little clips of candid hiker/biker comments now & then as well. Just seems to add a little more variety.
In a lot of my really old videos from way back, like more than 2 years, I used to have way too much commentary in the videos where there were at least two of us riding. We’d say stuff like, “Nice!” way too much and stuff like that.
I even made one video where we purposely said that phrase throughout the entire video, just to be annoying, lol! Since those days, I almost always let the riding do the talking, and maybe just have some trail sounds leak in a bit if there’s a big drop. I like hearing the impact while music is playing!
woohoo embalmer! Sounds like you are a natural. I am a 53 year old woman, only five feet tall (and shrinking). I live on a dirt road with rocks and hills and I love my nimbus 24" muni with the big fat tire. I have a KH freeride seat and love that too, but the gel seat that comes with the nimbus is pretty comfortable too. I have 20" and 26" unicycles as well but I seem to always ride the nimbus.
I’m seeing red hats in the hills on munis…
ok, jk
How do you ride a 24" and 26" being 5 feet tall? I’m 5’1" and my inseam is 28" but thats the lowest the seat would go. I dont see anyone riding with the leg fully extended… Just wondering as I might get into muni later.