Bones Skateboard Wheels 100's Black 54mm V5 Sidecuts ConicalBones Skateboard Wheels 100's Black 54mm V5 Sidecuts Conical Bones created a wheel with a substantially higher rebound for more speed and amazing slide capabilities while maintaining a resistance to flat spotting well beyond any standard wheel. The technology behind is proven. The Bones 100's Original Formula, All Terrain Formula, Skatepark Formula & Street Tech Formula, giving you more slide ability and way less flat spots. Skater engineered,