okay so i know there are two speed unis but i was wondering if it would be possible to gear up my 20" to make it ride like a 24" anyone know how 
make it like a girraffe unicycle with two cogs and a chain
run shorter crank arm them you go faster
i dont want to make agiraff and i heard of someone doing it without messing it up
Why would you want to gear up a 20" to a 24"? It’s not a huge difference and you’ll just end up with a heavy 24" Uni.
Florian Schlumpf has a Geared 20" which rides more like something between a 29’er and a Coker
Yes.