Quantum Bearing Science Metallic Series caps All the same great features

All the same great features of the Spark Flat Pucks

This footbed features a built-in metatarsal pad to support the foot's bones in their natural lift and spread

Central 360 Strap

and micro-adjustability with medium flex for a playful

Quantum Bearing Science Metallic Series caps All the same great featuresA twist on the classic. The Metallic series bearings are made with high purity, high quality carbon steel for the inner outer rings and roller balls. Then they run the raceways and roller balls through a proprietary diamond finishing process. From there Quantum includes high tensile strength, hydrophobic retainers these bearings were designed with stability, flow, and mechanical strength in mind. Each bearing is coated using their GraphFlo(TM) process