The main differences between the two types of racing are the terrain and bicycles. Road races are usually held on closed courses around a city, across a state, etc. They cover a lot of miles. Races can go from 1 mile sprints to centuries (100 miles), to the well known Tour de France. Distances are determined by the race, skill levels, type, etc. Mountain bike races are on closed courses obviously in the mountains. Single-track courses are the most prevalent. Like road races distances vary.
Road bicycles are significantly lighter and streamlined than mountain bikes. They are designed to fit their riders so comfortably they could ride hundreds of miles. They have skinnier tires for less friction on the road, and drop-style handlebars for comfort. A mountain bike is designed to deal with the terrain as well as the rider. Some mountain bikes may have full front and rear suspension, or none at all. They have beefier tires as well as stronger, thicker frames. The differences truly are night and day.
First answer by Mr559. Last edit by Mr559. Contributor trust: 0 [recommend contributor]. Question popularity: 1 [recommend question]





