With a cross country oriented geometry and its pretty thin tubes, GB04 is not intended for dirt jumps trails. However, thanks to a clever mix between modern geometry, without excess, and the choice of suitable materials (diameter and thickness of the CrMo steel tubes), this frame turns out to be surprisingly fun to ride, particularly on twisty singletracks. It is also very popular with riders who push their taste for simplicity to the point of riding single speed. GB04 is definitely the king of singles.