ሞዴል-በዳ ይነዳ ሰንሰለት መጀመሪያ አካባቢ ልማት ወዲህ መሠረታዊ ቅርጽ እና ቅን ወይም "የደህንነት በብስክሌት" ውቅር ዓይነተኛ, ትንሽ ተቀይሯል 1885.
The basic shape and configuration of a typical upright or "safety bicycle" has changed a little since the first chain-driven model was developed around 1885.