Bones 58mm 84b SPF Sloan Hammered P5 Sidecut Skateboard Wheels 4pk

Skatepark Formula™ (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. Skatepark Formula™ has a high resistance to abrasion while not compromising hardness and slide ability. Simply put… Skatepark Formula wheels grip better on slick surfaces, are almost impossible to flat spot, and are the fastest, longest lasting wheel on the market today.