Flowery top tube

ajoten

So my bike's top tube is a weird shaped cross section, like a 4-leafed flower/clover/club (as in cards suit).

Is this common? Or is mine special?

imposter2.0

random?

smidsy

Normal for a basso, special for everything else.

sloppyschleckonds

viewtopic.php?t=12886207&p=17948230

Monty Dog

Pioneered by Colnago many years ago on the Master in the mid-1980s, known as Gilco profile when bike frames were all made from round tubes - now copied by others including Basso.