In article , Chris Tolley wrote:
On Thu, 26 May 2005 00:38:02 +0100, Tom Anderson wrote:

TfL said:
"You will be able to transport a uni-cycle as long as it is less than 2
meters in length and if you can handle it easily in he event of an
emergency."

A unicycle 1.99m *long*? A pennyfarthing without the farthing...

I think while it's being carried the major dimension of a giraffe unicycle
counts as length not height.

http://semcycle.biz/record/ says the record is a unicycle 35m tall.
Banning it from the Underground seems entirely reasonable.