The Bones SPF Deathbox 81b P5 Wheels feature Bones’ unique Skatepark Formula™(SPF).
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. SPF has a high resistance to abrasion while not compromising hardness and slide ability. Simply put…SPF wheels grip better on slick surfaces, are almost impossible to flatspot, and are the fastest, longest lasting wheel on the market today.
Bones SPF Deathbox 81B P5 56mm wheels are high-quality urethanes that revolutionize the future of skateboarding. You won’t find the Skatepark Formula from any other wheel supplier so get a set and find out for yourself what the word on SPF is all about.
Bones have spent over 25 years making skateboard wheels. These days, Bones have superior urethane technology for 100 percent less flats pots. Slide when you want it, and grip when you need it.