Frameset Gary Fisher Procaliber 92 - 20"

[Bbill1972]

not mine....

https://www.leboncoin.fr/ad/velos/3022723030

 

[JoniMarin]

Something very pleasing about the geometry of this.
(Maybe also it's the black & chunky tyres... not my usual choice but looks great IMHO)

I still can't quite understand how it can be 20" given the head tube looks so small - but I guess the top tube is pretty flat... hmm.
Can anyone point me to a good thread on here about frame geometry?