Bones Wheels Hawk SPF Mini Cube 58mm Red/White Skateboard Wheels (Set of 4) Brand: Bones Wheels Wheel Size: 58mm PRO: TONY HAWK Set of four high quality skateboard wheels. NOTE: Wheels sold in sets of 4 only. Info: Skatepark Formula&#8482; (SPF) is very high quality urethane specifically formulated to resist flat spotting on slick or smooth surfaces while maintaining a higher rebound for a quicker response and a faster roll.