Slimeballs 50-50 Hairballs wheels are dyed with vivid colors on white high performance all terrain 95a urethane and feature art by FALU @falucasrolei based off the original art by Jim Phillips. Hairballs have a hard edge conical shape for firm lock in and wide riding surface for consistent speed and slide. Features: Diameter: 56mm Durometer: 95a Road Surface: 21.5mm Width: 37mm