Does the axle and toothed plate of mountain bike affect the riding speed? ? What do I need to buy to travel by bike?

What affects is not speed, but strength, but only a little upgrade. In fact, it's hard for beginners to understand that feeling. At least I felt it when I was on the steps. I don't feel much when I ride. There is a difference between long-distance travel and short-distance travel. You have to tell me what your car is, where to go and what to change.