The Bones STF V5 Wheels are specifically formulated for best skate performance. The V-Series Wheels are made with Bones Street Tech Formula (STF), that gives you more slide-ability and less flat spots and so more fun.
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.