Browsing through a nice site about retro futurist art
(http://www.darkroastedblend.com/2007/11/retro-future-to-stars.html) I was surprised to notice a beautiful picture of a space unicycle:
http://www.plan59.com/av/av077.htm
Looks a bit cumbersome but I bet you could do amazing hops in lunar gravity… Q: Do I get an aluminium frame to save weight? A: No, go live on the moon!!!