Spitfire Formula Four Skateboard Wheels Radial 99DU Natural 54mm 40-60 The Cerbec ceramic balls are

The Cerbec ceramic balls are much lighter

Dual elasticated Velcro straps and triple Velcro straps on wrist-guard

2-stage foam liner

56mm height diameter x 36mm width with a 25mm riding surface

Superior Pro-tec quality throughout

Spitfire Formula Four Skateboard Wheels Radial 99DU Natural 54mm 40-60 The Cerbec ceramic balls areSpitfire Formula Four Skateboard Wheels Radial 99DU Natural 54mm Features : 54mm height diameter x 34mm width with a 20mm riding surface. Based on the classic Radial shape with a thinner riding surface and flatter side edges to lock in tricks. Renound Spitfire high quality true performance 100% urethane. 99duro hardness makes these grippy without the loss of speed. Spitfire's unmatched true performance flatspot resistance wheels.