Because sooner or later you have to land, whatever the landing area and sometimes even in turbulent atmospheric conditions. Concepted by Jean-Claude Moreau with others experimented pilots and manufactured by his society, Plastiqual SA in Belgium, the famous Plastiqual
safety wheel meets the need for security
Designed to be disassebled on site for fitting/removal, and to be shock resistant.
NOTE - this listing is for a used set.