For trials, you're going to want a 20" with a fat tire;
For freestyle, you're going to want a 20" with a narrower tire;
For commuting, you're going to want at least a 26" (29 or Coker would be
better).
So what you need is a unicycle with changeable wheels and probably a
changeable frame as well to fit the different sizes. You'll also want a
wider hub for trials and Muni, and a narrower one for commuting and
freestyle. Oh, and for commuting you're going to want shorter crank
arms, and longer for trials and MUni.
So my suggestion is to get a shapeshifting uni. Or many unicycles.
I've got a 24" that I used for all the above. That would probably be
your best bet. As for what kind, you're on your own. Get something
with a flat crown, but that's about all I can tell you. Good luck, and
when you discover the "holy grail" of unicycles, tell me too!


--
paco - Creator of the "BUni"

"We are all interested in the future, for that is where we will spend
the rest of our lives."
-Plan 9 From Outer Space
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