The 1st MONTY Trial bike in USJ

Bike trials is a form of mountain biking derived from motorcycle trials. The rider negotiates man-made and natural obstacles without their feet touching the ground. It originated in Spain.
At the most basic level, trials riding can be summed up as bicycle handling skills. It evolved from motorcycle trial riding (jumping up, over obstacles, man-made or natural) into an off-season bicycle pastime. It now has a strong — though small — following, and can be seen worldwide.

Skills taken from trials riding can be used practically on any bicycle for balance, for example controlled braking and track standing, or balancing on the bike without putting a foot down. Trial bike characteristics include, but are not limited to: powerful brakes, wide handlebars, light parts, low gearing, a thick rear tire that provides grip, a heavy emphasis on frame geometry, and no seat (depending on the make)