Fireball Scorch Longboard Skateboard Wheels for Cruising and Downhill Riding, 71mm in 81a, 84a, 87a (Set of 4) Fireball Scorch 71mm 81a White Longboard Wheels. Centerset core placement is the perfect design for a freeride wheel. It offers grip, slip, and rotation. That is why we spent years designing, shredding, changing, and perfecting the Scorch. The flawlessly symmetrical shape was something we were told could not be done.