History We put a lot of time and resources into development building prototypes and trial and evaluation bikes. Andries Gaastra en Marion Gaastra-Kowallik Sofabike 1st prototype Sofabike 2nd prototype Sofabike 3rd prototype Giant Revive - Became a global success - Sofabike 4th prototype Sofabike 5th prototype Sofabike 6th prototype (design) Balance Was quickly awarded: The safest bike in Europe.