Spitfire Formula Four 99D Apocalypse Radial Skateboard Wheels Size:53.5mm Exposed STI EVOLUTION® FOAM outsole

Exposed STI EVOLUTION® FOAM outsole

This is no ordinary extruded base

the Dennis Enarson BMX Slip-On offers maximum performance benefits with Dennis’s timeless style

Krux Pros ride the K4's

Spitfire Formula Four 99D Apocalypse Radial Skateboard Wheels Size:53.5mm Exposed STI EVOLUTION® FOAM outsoleSpitfire Formula Four 99D Radial Skateboard WheelsTested by Spitfire Team riders, Formula Four Performance Urethanelasted longer, withstood more abuse and performed superior to all other wheels. Spitfire Formula Four Urethane was developed to combine all the desired properties of a performance wheel without sacrificing any one attribute at the expense of another. Formula Four's True lasting Performance Urethane comes not from a single benefit, but