Bustin Boards ThermoCarbon Maestro Pro Complete Downhill Longboard Skateboard - 9.5" x 39.75" Bear Grizzly 5.01 Trucks. Bustin Snipers 75mm/80a Wheels. Bustin Abec7 Bearings. The ThermoCarbon construction is our revolutionary new process for creating stronger, lighter and more eco-friendly decks right here in the USA. We start with 4 plys of Great Lakes Maple and lay them up with a proprietary thermo-active formula along with several layers of carbon and fiberglass cloth.