You can feel the true joy of riding a bike when you push yourself hard, and sometimes more so when you reach a slope. Genuine bicycling revolves around the feeling of accomplishment on every climb and over every long stretch. This feeling can only be achieved with an authentic mountain bike.
You'll likely find Singlespeeds & Fixies with equipment to increase their speed and reduce their effort when you search in your local area.
These bicycles allow the rider to choose the right gear ratio for him based on how much strain he may be carrying, and how well he hopes to paddle. These bikes are well-suited for long trips and when speed is important.
The single-speed mountain bikes are for those who want to achieve true bicycling satisfaction. A single-speed mountain bike is the same as a basic bicycle, which was created when the first two-wheeled bicycle with a paddle was invented.
When I look around, I see that these bicycles are slowly being replaced by modern-day bicycles. People want efficiency over effort. Individuals who are less inclined to use a multispeed bicycle would prefer a fixed gear over a single speed that has a cassette or flip-flop hub. This is simply because it's easier to switch between speeds, improving overall performance.