It is the internal combustion engine category with displacements of 3.5 – 7.5 – 15 – 35 cm3 where the hull, monocarena a V, It is built in glass fiber, carbonio e kevlar e può variare in lunghezza da 60 cm to 150 cm.

La radio dispone di 3 commands, ie gas, timone, miscelatore. The speeds achieved are of the order of 90 km/h.

The peculiarity of this category are the very sharp turns that can run in the race who submit all the organs of the hull to the strong lateral forces.