Bones Wheels SPF Caballero Bat Wings

The 84B rating is significantly harder than the standard A-scale, placing these wheels in the high-performance category for skateparks. This hardness provides a very fast, responsive roll on smooth concrete and wood surfaces, though it will feel less forgiving on rough asphalt.

Yes, the SPF (Skatepark Formula) urethane is specifically engineered to resist flatspotting. While no wheel is completely immune to damage from extreme power slides, this formula is widely considered one of the most durable options for maintaining a round shape under heavy use.

The sidecut profile creates a wider contact patch and a more stable edge, which helps you lock into grinds and maintain control during high-speed carving. It offers a slightly more locked-in feel compared to a traditional rounded wheel shape.

These are primarily designed for park skating, where the 60mm diameter helps maintain momentum and speed through transitions. If you ride a standard street setup, you may need riser pads to prevent wheel bite, as this size is larger than the typical 52-54mm street wheel.

These wheels strike a balance between grip and slide. The SPF formula is designed to grip when you need it for carving, but it breaks into a slide predictably and consistently once you initiate the motion, making them ideal for technical park tricks.