Modern bicycles come in a variety of designs and speeds. They all date back to the early 19th century single speed motors and are still very popular with beginners and professionals alike.
Teenagers tend to be more enthusiastic about learning to pedal and balance a modern wheel bicycle(which is also known as “modernes rad fahrrad”in German language) than adults just starting out.
That said, cycling is a great way to get out and about, especially if you're there for the thrill and adventure. But before you become a pro and decide on a “well designed bike”, it is best to consider the advantages of unicycles.
One of the most obvious reasons why "single" is preferred by beginners is its simplicity. If you look at the "Single", you'll notice that it only has one gear on the crank and on the rear wheel.
You may find that there are no cables or switches; so without changing gears while cycling. This design makes it very attractive not only for beginners but also for those who are looking for a simple and elegant bike that can travel from one place to another.
Another obvious reason is less maintenance. With more complex machines, you will need to maintain and maintain gears and parts. And of course, the more parts and tools you use, the greater your responsibility for repairs and inspections.