What is the slowest bike in the world? The Turtle Bike takes the crown as the ultimate sloth on wheels. With its sluggish speed of 0.17 mph, it makes a snail look like a racecar. This bike, designed for the tortoise in you, ensures an excruciatingly leisurely ride. Don’t expect to break any records, but if you’re looking for a laid-back journey, this tortoise-inspired contraption is your perfect match.