Every try removing a tight or stuck seatpost without twisting it?
Now what I would love is a frame and seatpost with a line down the centre, so that I can make sure my seat is on straight!
any thoughts on the new animal single clamp?
http://www.unicycle.com/shopping/shopexd.asp?id=1206
Get it nice and straight, ride it for awhile to make sure, and them mark it with a sharpie.
Real men unicycle with slightly crooked seats.
Those look fascinating; I’m tempted to order one…
No, that’s a perfectly reasonable question. On a bike, twisting forces applied to the seat are minimal compared to what we do to a unicycle. Maybe a different method would make more sense.
But not the Schwinn/Semcycle method, which only gives you 1" increments of adjustment. For those of you that didn’t “grow up” with one, can you imagine only 1" adjustments? Also, some older (low-end) unicycles used a set screw, which would poke into the seat post and hold it in place. But that’s more to do with the use of cheap components than an inability to hold a seat post straight.
The problem with using a non-tubular post would be when it gets stuck in there. Most materials have a tendency to bind when they fit tightly together, so I’d hate to have my 5-sided post be un-moveable and un-twistable. Better to just use a clamp that works.
But here’s an idea. You know how your seat tube has that little slot in the back? What if there were a little slot in the post as well, and you had a little insert device that you stuck in there, that would snap on so it wouldn’t fall out, and keep the two slots lined up? Not sure what having a slot (or hole) in the post would do to strength or tightness, but it could be a simple method of preventing twist.
Though I think this is less about the clamp and more about the materials in your frame and post, and how well they fit together in the first place. Chromed steel posts in steel frames seem to be the most twist-prone. But the alloy posts in my aluminum Wilder MUni frame seem to stay in place very nicely, with a lightweight, single-bolt clamp. Never had a problem there.
I have this beautiful, red Koxx-One seat clamp, brand new, that doesn’t seem to fit any of the unicycles I would use it on. I don’t know the size, but I would guess Koxx size…
would a koxx-one seat clamp fit on my nimbus isis trials?
if not i will probably just get the animal clamp from dans com because thats where i am getting my pedals from.
http://www.danscomp.com/products.php?cat=PARTS&show=SeatPostClamps
Theres the sum of all your problems.
Oh yeah, for all the people that awe and oogle over profile stuff… there seat post clamps arent that great.
I change my seat height with an allen wrench and it takes all of 30 seconds or so. Unless you’re paying for your trail use by the minute, I don’t see how this could be such a major issue.
If you keep the wrench easily accessible (mine’s stashed in a small pouch on one of my Camelbak’s cross-straps) then it’s no pain at all.
Are you referring to the smooth posts or the knurled ones? I doubt a knurled post would twist very easily.
It takes me 30 seconds to dig my damn allen tool out of the bottom of my butt bag. No matter where you put it, the next time you go in there it’s under everything else. 
They have knurled seat posts for unicycles? Most of my twist problems were from my earlier years of riding, when I was learning lots of tricks and using bad technique. In those days, all the unicycles tended to have smooth chrome posts. They even twisted easily in a rusty seat tube! It didn’t help that the clamps that came with the Miyata unicycles (the high-end stuff of the time), which were welded on, just weren’t that strong. I crushed a few, and finally just cut them off, extended the slot and lived with a shorter seat tube.
lol
wow, uhm
i had a primo viking seat post clamp. its a megabeast. wouldn’t go with anything else, it has enough metal to tap it out and put bigger bolts, but you would have to be superman to strip this sucker out!
Koxx Frames have 31.8mm (inside the seat clamp)
I don’t see how double bolt clamps strip easier…
But for people with this problem, use two single bolt clamps… if there is a lip on them, file the lip off so it slides down more.