Spitfire Formula Four Wheels Lock-In Full - Various £60.00 Variants 99DU - 55mm - £60.00 99DU - 57mm - £60.00 99DU - 54mm - £60.00 Quantity Add to Cart This variant is currently sold out Please fill in the form below if you'd like to be notified when it becomes available. Your Email The #1 Shape in skateboarding worldwide - proven for speed and control.