There could be a couple;..
All of these are base on stereotype and as @Ramsaye said we still don’t know fully to why it’s predominate in Italy.
Stereotype or not, it's simply what I see happening here.
@MementoMori started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
All of these are base on stereotype and as @Ramsaye said we still don’t know fully to why it’s predominate in Italy.