Road bikes are generally built in such a way so that they enhance the speed, and provide better mileage whereas on the other hand the mountain bikes are built to cater to the stability task.

In current large-scale and high-spirited urbanization, for the sustainable development of residents 'living environment, mountainous region has become more and more impotent.

If you use high gear on a mountain bike, and you try to climb up a steep incline it is very difficult to peddle isn't it?... same principal here.