Roll cage for motor bikes!

seen from United States
seen from United Kingdom
seen from United States

seen from United Kingdom

seen from Russia

seen from United Kingdom

seen from Russia
seen from Russia
seen from United States
seen from United States
seen from United Kingdom
seen from United States
seen from China

seen from United States

seen from France
seen from China

seen from Türkiye
seen from United States
seen from United States

seen from United Kingdom
Roll cage for motor bikes!
1948
HOUSTON BIKELIFE
Never twist the throttle with your ego.
Motorized racing, The University of Iowa, May 1964
Creator: unknown
Source: https://digital.lib.uiowa.edu/islandora/object/ui%3Awpe_2175
A video of the frictional strength of Asphalt or Bitumen on metal, showing why 'Road Rash' is such a serious injury in motor accidents.