Learning to ride a giraffe: wheel size 20" or 24"

Hi guys,

I would like to learn riding a six footer. I would have access to one
having a 20" wheel and one with a 24" sized wheel.

[1] What are your recommendations?
[2] What are the pros and cons?


Cheers, All those who believe in psychokinesis raise my hand. Franz

You can reach me at Franz<Dot>Brandl<At>ascom<Dot>ch