What type of terrain is primarily used for jumps in cycling?

Jumps in cycling are primarily performed on off-road terrain. This type of terrain often includes features like dirt jumps, ramps, and other obstacles that are specifically designed to allow cyclists to launch into the air. Off-road environments provide the necessary variation in incline and surface stability that are essential for safely executing jumps.

While flat roads can accommodate certain maneuvers like speed or short sprints, they lack the features that facilitate jumps. Uphill terrain typically presents challenges that are not conducive to jumping, such as decreased speed and increased effort. Weathered trails may contain obstacles, but they often include loose gravel or uneven surfaces that can increase the risk of falling or losing control during a jump. Thus, for performing jumps effectively and safely, off-road terrain is the optimal choice.