JamesM
Senior Retro Guru
Because it was two tyred 
:facepalm:
On a more serious note; this is an interesing video on why bicycles do stand up on their own:
https://www.youtube.com/watch?v=2Y4mbT3ozcA
:facepalm: On a more serious note; this is an interesing video on why bicycles do stand up on their own:
https://www.youtube.com/watch?v=2Y4mbT3ozcA
