Mountain bikes also called all-terrain bicycles, are designed primarily for off-road riding – a recreational sport that emerged in the 1970s. Today’s bikes are designed for not just the more rugged type of terrain, but for all kinds of surfaces you’ll likely encounter.
The mountain bike similar in basic structure to any bike – with two wheels on a frame, chain, handlebars, and seat. But nowadays, more often than not, a mountain bike often has suspension on both the frames and forks as well as heavier-duty, oversized wheels and stronger braking systems (as compared to regular bicycles). They also have lower gear ratios making it easier for a mountain bike to climb hills.