size: 54 mmcontact patch: 22 mmwidth: 32,5 mmdurometer: 99Aformula:Spitfire's Formula Four Urethane Formulahigh abrasion resistance and flatspot resistance, anti-stick slide for constant, fast and smooth slidesshape:Formula Four Classictimeless shape that is proven for speed and controldetails: graphic print on the frontterrain: all terrains Spitfire Formula Four OG Classics 99DU Skateboard Wheels Blue 54mm