Vehicle metric cogged V-belts are single belts that have metric dimensions and mount to metric pulleys to transmit power from the engine to accessory systems in a vehicle. They have grooves across the width of the belt to help dissipate heat. The fit of the belt's V-shaped profile in the groove of the pulley and the proper belt tension are key to a drive system's performance. These automotive V-belts are categorized by their top width.