Bones SPF Wheels

The 81B rating is equivalent to 101a on the standard A-scale, making these very hard wheels. They are designed specifically for speed and sliding on smooth concrete or wood surfaces found in skateparks, rather than absorbing vibration on rough street terrain.

While you can ride them anywhere, they are engineered specifically for skatepark use. Because they are quite hard, they will feel very unforgiving and vibrate significantly on rough asphalt or cracked sidewalks.

The P5 shape is a versatile, modern profile that balances stability with a responsive edge. It provides enough surface area for solid landings and control, but keeps the weight down for technical tricks.

Yes, the Skatepark Formula (SPF) urethane is specifically engineered to resist flatspotting. While no wheel is completely indestructible, this formula is significantly more durable than standard urethane when performing power slides on smooth park surfaces.

These wheels offer a 'controlled' feel. They provide enough grip to hold a line through a bowl or transition, but they break into a slide predictably when you initiate it, which is ideal for technical park skating.