Bones Wheels - SPF Pool & The Gang - 81B Size:54mm KPU 3D Grid exoskeleton and

KPU 3D Grid exoskeleton and mesh uppers provide structure and breathability

The handle converts to padded backpack straps for easy hauling

Biax Fiberglass: A dual-direction

With color-coded clips and poles that snap together

Bones Wheels - SPF Pool & The Gang - 81B Size:54mm KPU 3D Grid exoskeleton andSkatepark Formula (SPF) is very high quality urethane specifically formulated to resist flatspotting on slick or smooth surfaces while maintaining a higher rebound for a quicker response and a faster roll. Skatepark Formula has a high resistance to abrasion while not compromising hardness and slide ability. Simply put Skatepark Formula wheels grip better on slick surfaces, are almost impossible to flatspot, and are the fastest, longest lasting wheel