Why did he invent the Victorians bikes Karl Dries?

Answer 1

The man was called Karl Drais, and he was a German inventor. He was not a "Victorian", because he lived and died before Victoria's reign. He invented the machine he called a 'running machine', and technically it was not a bike because it didn't have pedals.

But apart from that: he invented it for no particular reason, but had worked out that in theory man could move faster and with less effort sitting on this 'machine' and pedalling with his feet. At the time it was more a plaything for rich young men (its nickname was the 'dandy horse') than a practical way of going very fast. The machine would at least have needed smooth, paved roads to make any real speed, and those were still very rare at the time.