Look what I found.

[Wobbly John]

Is that how your name came about?

It's because I'm well known for riding a rather wobbly bike:


View: https://youtu.be/Ylt4DIDVwas

(I'm the second rider seen on it - sorry about the low-res. Uploaded before broadband)

 

[robsa]

Oooh not seen one of those for years. Won a fiver at the local gala on it

 

[Gravity Aided]

Swingbikes, we called those in the States. I think Jimmy Osmond used to be in their ads.