Dragon Formula™ is Powell Peralta's latest next generation polyurethane breakthrough. Dragons are mid hardness 93A and 97A wheels that smooth out rough terrain. Now you can roll over previously unskateable terrain on your way to a skate spot, and then skate it as well or better than before with the same wheels. This is because dragons slide like 99A & 101A wheels and still grip when needed. This makes dragons very special and unique.