Bones Wheels SPF Caballero Skateboard Wheels

The 84B rating is equivalent to 104A on the standard Shore A scale, making these wheels very hard. This hardness is ideal for maintaining high speed on smooth surfaces like concrete skateparks, as it minimizes rolling resistance and prevents the wheels from deforming under pressure.

While these are high-performance wheels, they are specifically engineered for smooth surfaces like skateparks, bowls, and vert ramps. Because they are so hard, they will feel very rough and vibrate significantly on asphalt or rough street terrain.

The sidecut shape provides a wider contact patch and a more squared-off edge compared to traditional rounded shapes. This design helps lock the wheel into coping and transitions, giving you more stability and control when you're carving or grinding.

No, the Skatepark Formula (SPF) urethane is specifically formulated to resist flat spots, even with aggressive power slides and heavy impact. They are built to maintain their round shape and consistent performance over a long lifespan.

56mm is a versatile size for park and transition skating. It provides enough mass to carry momentum through bowls and ramps while remaining light enough for technical tricks and flips.