The difference between a 20 and a 24 is significant: the 24 is 20%
bigger.
Generally, a 20's best for learning and for skills. A 24's more
versatile and better for longer journeys or rough ground.
29s are for longer distances, rougher terrain, but are less
manouvreable, and a bit more of a handful on hills. 26s are a sort of
half way house between 24s and 29s.
Height and weight will influence your choice to some extent. I'd guess
that you'd still do best with a 20 as your first uni, but it is fair to
say that you'd manage a 24 better than you would if you were 5 foot 7
and 140 pounds.
If you stick with the sport, you will end up with more than one uni. If
you don't stick with it, the 20 will be easier to sell.
--
Mikefule - Roland Hope School of Unicycling
Everyone should be fatuous for 15 minutes.
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