Downhil biking is a time trial mountain biking sport held on a course with a decrease in elevation. The races are held on steep, rocky off-road terrain, often involving jumps as high as 4-5 meters. Not any kind of bike is used for these kinds of competitions, you need full-suspension bikes, with large tires, disk brakes and special geometrics for the frame. The safity gear used for this sport is very professional, involving full body armor and full face helmet. Some of these bikes and gear can be as expensive as 10000 euros.