Ukrainian DIYer Builds Super-Fast Bicycle with Double Chain System

Ukrainian inventor Artists 3D created a unique bicycle modification. He welded a star-shaped cog to a larger metal disc and added a second chain system. This modification increases the bicycle's speed, but requires more physical effort. "The increased speed is noticeable, but it's definitely a more intense workout," Artists 3D commented. This DIY project shows how simple modifications can significantly impact bicycle performance. The video's popularity suggests widespread interest in such innovations.