Grit Extremist Stunt Scooter - Black Grit Pro Scooters incorporate the latest in computer-aided design techniques and constant feedback from its team riders around the world to produce some of the most advanced complete Pro Scooters and custom pro scooter parts on the market. Using only the highest grades of raw materials| Grit Scooters design and manufacturing is constantly improving to ensure that Grit products stay at the forefront of extreme scootering.