A final important difference is in the gears. BMX bikes typically have only one gear. They rely on momentum to gain speed. But mountain bikes have many different gears. Multiple gears allow mountain bikers to go up and down all sorts of surfaces more easily.

This paragraph explains the effects of the differences. The contrasting frame, tires, and gears make for a different riding experience. Because they are short and light, BMX bikes are great for doing tricks and getting lots of air. The handlebars even spin all the way around. On the other hand, mountain bikes’ heavy frames, big wheels, and many gears make them great for riding up and down hills and off the road.