Bones Caballero Side Cut

SPF stands for Skatepark Formula. It is a specialized urethane blend engineered specifically for smooth surfaces, offering high rebound for speed and exceptional resistance to flatspots during heavy park sessions.

The narrow profile reduces the overall contact patch, which makes the wheels feel more nimble and responsive. This design is ideal for technical maneuvers and quick pivots where you need less friction and more precision.

They feature a smooth surface coating that provides a bit of initial grip, but they are designed to break in quickly. After a few sessions, you will find a consistent, predictable feel that balances grip and slide.

These are specifically optimized for skateparks and smooth concrete. While they are durable, their hardness and narrow shape are not ideal for the vibration dampening needed on rough street terrain.

The twice-baked formula increases the density and structural integrity of the urethane. This results in a wheel that holds its shape better under high-impact landings and resists developing flatspots over time.