sentences:  With aggressive skates, the flat setup obviously leads to better control on the ground when either accelerating on a push or decelerating on a drag because of increased traction.What's more it grants a faster speed, translating to faster grinds, more powerful pumps in a skate ramp and/or higher heights ('airs') off the edge of a vert ramp.Indeed, flat setups are quick save for the likelihood that they will be heavier and the two standard central wheels tend to 'bite' when grinding.