There can be no reliable statistics - think of any hobby and think if people doing it are registered statistically. For instance: A friend of mine recently took up unicycling as a hobby, he bought a second-hand unicycle. His activity is not recorded anywhere.

Yes, this is possible. Clowns are specially trained to perform what seems to us like amazing tricks, including juggling while riding a unicycle. Of course, not every clown can do it well, and it is a difficult trick; I enclose a link to a video of Buddy, a Canadian clown who mastered it.

tighten the clamp up

"uni" from the Latin "unus," meaning "one" is the prefix in this case.

Thus a unicycle is a one-wheeled vehicle.

In the 1950's and early 60s Sears bicycles were sold under the name " J.C. Higgins" (perhaps a jab at their competitor J.C. Pennys?).

For a while in the later 60's and early 70's, they only bore the "Sears" name.

During this time, many of their "lightweight" bicycles were manufactured by Puch bicycles from Austria, and were of very high workmanship.

About 1973 Sears began offering Huffy bicycles under the name "Free Spirit".

use left and right arrows to balance

Depends on the type of riding you intend to do. A 24" wheel is good for general riding around, but for tricking you would be best to get a 20". One of the best places to find decent unicycles is www.unicycle.com. Have a look around.

i found the best way was to just start off without something or someone beside you to hold onto and then gradually lean off using it or them after a while.

It feels much like riding a bicycle, so if that hurts you then yes.

You buy one. There are so many special parts involved that building one out of generic parts is pretty much impossible.

Trials competitions are like freestyle except in an urban environment.

Dan uses a dildo operated unicycle similar to the one your mom uses but with a wheel.

It depends on the question. A Ripstick skateboard only has 2 wheels while a tricycle has 3 wheels. If you mean the number of wheels combined, then it will be equal, if you have a normal unicycle, skateboard, and tricycle.

Probably the most correct you can get is 'monociclista.' Reason: While 'monociclista' is not in the DICCIONARIO DE LA LENGUA ESPAÑOLA, both the word 'monociclo' (unicycle) and 'ciclista' (bicyclist) are. (Actually, 'monociclo' is just now being considered for the 23rd edition which is being readied for future publication.) I believe 'mono' and 'ciclista' constitute a fair conjoining of suffix and root word. I suppose the main question that needs to be answered is, if you used the word, would you be understood? Given the proper context, I believe you would be clearly understood if you said monociclista to mean unicyclist... you may even be thought a bit avant-garde.

Yes and also a verb

It could pop the tire, scratch the frame, or tear the seat.

For enjoyment, a challenge when a biycicle becomes boring, to learn tricks and perform them. When you know how to ride one it becomes an addicting hobbie, in my opinion

a good starter unicycle is the torker unistar, and is $80.00-$130.000, oh and they have one wheel :).

Thrust (from the pedals), gravity (you lean in the direction you want to go), Drag (air slowing you down), and if you hop on your unicycle: thrust.

Where you ride a bike that only has 1 wheel.

Who even cares....